CC BY-NC-ND 4.0 · Arq Neuropsiquiatr 2021; 79(11): 1049-1061
DOI: 10.1590/0004-282X-ANP-2021-0162
Brazilian Academy of Neurology

Recommendations by the Scientific Department of Neuroimmunology of the Brazilian Academy of Neurology (DCNI/ABN) and the Brazilian Committee for Treatment and Research in Multiple Sclerosis and Neuroimmunological Diseases (BCTRIMS) on vaccination in general and specifically against SARS-CoV-2 for patients with demyelinating diseases of the central nervous system

Recomendações do Departamento Científico de Neuroimunologia da Academia Brasileira de Neurologia (DCNI/ABN) e do Comitê Brasileiro de Tratamento e Pesquisa em Esclerose Múltipla e Doenças Neuroimunológicas (BCTRIMS) sobre vacinação em geral e contra a SARS-CoV-2 para pacientes com doenças desmielinizantes do sistema nervoso central
1   Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre RS, Brazil.
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2   Universidade Federal de Sergipe, Aracaju SE, Brazil.
3   Universidade Tiradentes, Aracaju SE, Brazil.
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4   Universidade de Campinas, Faculdade de Ciências Médicas, Campinas SP, Brazil.
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5   Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo SP, Brazil.
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6   Universidade Federal de Minas Gerais, Belo Horizonte MG, Brazil.
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7   Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, São Paulo SP, Brazil.
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6   Universidade Federal de Minas Gerais, Belo Horizonte MG, Brazil.
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8   Universidade Federal do Amazonas, Manaus AM, Brazil.
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9   Universidade Federal do Paraná, Curitiba PR, Brazil.
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10   Hospital Sírio Libanês, São Paulo SP, Brazil.
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6   Universidade Federal de Minas Gerais, Belo Horizonte MG, Brazil.
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11   Escola Bahiana de Medicina e Saúde Pública, Salvador BA, Brazil.
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7   Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, São Paulo SP, Brazil.
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7   Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, São Paulo SP, Brazil.
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12   Hospital Geral de Fortaleza, Fortaleza CE, Brazil.
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7   Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, São Paulo SP, Brazil.
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13   Clínica Nossa Senhora das Graças, Cuiabá MS, Brazil.
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14   Hospital Santa Marcelina, São Paulo SP, Brazil.
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12   Hospital Geral de Fortaleza, Fortaleza CE, Brazil.
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15   Santa Casa, Belo Horizonte MG, Brazil.
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16   Instituto de Infectologia Emílio Ribas, São Paulo SP, Brazil.
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17   Fundação Centro Integrado de Apoio ao Portador de Deficiência, João Pessoa PB, Brazil.
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18   Secretaria de Estado da Saúde, Brasília DF, Brazil.
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19   Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ, Brazil.
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20   Santa Casa, Londrina PR, Brazil.
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21   Hospital de Clínicas de Passo Fundo, Passo Fundo RS, Brazil.
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22   Universidade Federal de Goiás, Goiânia GO, Brazil.
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5   Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo SP, Brazil.
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23   Universidade Estácio de Sá, Rio de Janeiro RJ, Brazil.
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24   Private Service, Goiânia GO, Brazil.
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25   Hospital São Francisco na Providência de Deus, Rio de Janeiro RJ, Brazil.
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26   Universidade Federal do Ceará, Fortaleza CE, Brazil.
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1   Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre RS, Brazil.
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7   Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, São Paulo SP, Brazil.
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27   Associação Brasileira de Esclerose Múltipla, São Paulo SP, Brazil.
28   Santa Casa, São Paulo SP, Brazil.
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23   Universidade Estácio de Sá, Rio de Janeiro RJ, Brazil.
29   Universidade Federal Fluminense, Niterói RJ, Brazil.
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29   Universidade Federal Fluminense, Niterói RJ, Brazil.
30   Pontifícia Universidade Católica, Campina SP, Brazil.
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31   Instituto de Neurologia de Curitiba, Curitiba PR, Brazil.
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32   IAMSPE, São Paulo SP, Brazil.
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33   Private Service, São Paulo SP, Brazil.
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34   Universidade da Região de Joinville, Joinville SC, Brazil.
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35   Hospital Moinhos de Vento, Porto Alegre RS, Brazil.
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36   Santa Casa, Rio de Janeiro RJ, Brazil.
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37   Universidade Federal Ciências da Saúde de Porto Alegre, Porto Alegre RS, Brazil.
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7   Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, São Paulo SP, Brazil.
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38   Private Service, Curitiba PR, Brazil.
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15   Santa Casa, Belo Horizonte MG, Brazil.
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39   Faculdade de Medicina de Jundiaí, Jundiaí SP, Brazil.
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40   Hospital Israelita Albert Einstein, São Paulo SP, Brazil.
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6   Universidade Federal de Minas Gerais, Belo Horizonte MG, Brazil.
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41   Hospital de Base do Distrito Federal, Brasília DF, Brazil.
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42   Hospital Beneficiência Portuguesa, São Paulo SP, Brazil.
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43   Hospital Regional de Vilhena, Vilhena RO, Brazil.
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44   Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro RJ, Brazil.
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45   Hospital Universitário Prof. Edgar Santos, Salvador BA, Brazil.
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22   Universidade Federal de Goiás, Goiânia GO, Brazil.
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38   Private Service, Curitiba PR, Brazil.
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46   Universidade Metropolitana de Santos, Santos SP, Brazil.
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23   Universidade Estácio de Sá, Rio de Janeiro RJ, Brazil.
29   Universidade Federal Fluminense, Niterói RJ, Brazil.
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47   Hospital da Restauração, Recife PE, Brazil.
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28   Santa Casa, São Paulo SP, Brazil.
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48   Universidade Estadual Paulista, Faculdade de Medicina de Botucatu, Botucatu SP, Brazil.
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4   Universidade de Campinas, Faculdade de Ciências Médicas, Campinas SP, Brazil.
49   Universidade de Brasília, Faculdade de Medicina, Brasília DF, Brazil.
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The Neuroimmunology Brazilian Study Group › Author Affiliations

ABSTRACT

The Scientific Department of Neuroimmunology of the Brazilian Academy of Neurology (DCNI/ABN) and Brazilian Committee for Treatment and Research in Multiple Sclerosis and Neuroimmunological Diseases (BCTRIMS) provide recommendations in this document for vaccination of the population with demyelinating diseases of the central nervous system (CNS) against infections in general and against the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes COVID-19. We emphasize the seriousness of the current situation in view of the spread of COVID-19 in our country. Therefore, reference guides on vaccination for clinicians, patients, and public health authorities are particularly important to prevent some infectious diseases. The DCNI/ABN and BCTRIMS recommend that patients with CNS demyelinating diseases (e.g., MS and NMOSD) be continually monitored for updates to their vaccination schedule, especially at the beginning or before a change in treatment with a disease modifying drug (DMD). It is also important to note that vaccines are safe, and physicians should encourage their use in all patients. Clearly, special care should be taken when live attenuated viruses are involved. Finally, it is important for physicians to verify which DMD the patient is receiving and when the last dose was taken, as each drug may affect the induction of immune response differently.

RESUMO

O DC de Neuroimunologia da ABN e o BCTRIMS trazem, nesse documento, as recomendações sobre vacinação da população com doenças desmielinizantes do sistema nervoso central (SNC) contra infecções em geral e contra o coronavírus da síndrome respiratória aguda grave 2 (SARS-CoV-2), causador da COVID-19. Destaca-se a gravidade do atual momento frente ao avanço da COVID-19 em nosso País, o que torna mais evidente e importante a criação de guia de referência para orientação aos médicos, pacientes e autoridades de saúde pública quanto à vacinação, meio efetivo e seguro no controle de determinadas doenças infecciosa. O DCNI/ABN e o BCTRIMS recomendam que os pacientes com doenças desmielinizantes do SNC (ex., EM e NMOSD) sejam constantemente monitorados, quanto a atualização do seu calendário vacinal, especialmente, no início ou antes da mudança do tratamento com uma droga modificadora de doença (DMD). É importante também salientar que as vacinas são seguras e os médicos devem estimular o seu uso em todos os pacientes. Evidentemente, deve ser dada especial atenção às vacinas com vírus vivos atenuados. Por fim, é importante que os médicos verifiquem qual DMD o paciente está em uso e quando foi feita a sua última dose, pois cada fármaco pode interagir de forma diferente com a indução da resposta imune.

Author’s contributions:

JB, LCF, AD, DBB, PC, DG, MALP, NACS, SMA, TA, JSA, TJ, SLAP, ABAGRG, MP, RP: conceptualization, writing of original draft, methodology; JB, FG: project administration and supervision; JB, LCF, AD, DBB, PC, DG, MALP, NACS, SMA, TA, JSA, TJ, SLAP, ABAGRG, MP, RP: writing, review & editing; AKG, ACP, JAA, APGN, ACPO, BSO, CBT, CFV, DKM, DV, DS, EMLO, FRM, FEB, FFAF, FAAG, GRP, GDS, GSO, GACS, HHR, HKS, HRSN, LCC, MVMG, MCAV, MLVP, MCR, MB, MKFP, RBSM, RL, RBT, RK, RMD, SG, SAL, SAL, TF, TAGJR, TCAW, YF, OJMN, MLBF, MFM, DGB, FG: final approval by all participants of the Neuroimmunology Brazilian Study Group.




Publication History

Received: 24 April 2021

Accepted: 30 May 2021

Article published online:
04 July 2023

© 2021. Academia Brasileira de Neurologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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  • References

  • 1 Faria NR, Mellan TA, Whittaker C, Claro IM, Candido D da S, Mishra S, et al. Genomics and epidemiology of the P.1 SARS-CoV-2 lineage in Manaus, Brazil. Science. 2021 May 21;372(6544):815-21. https://doi.org/10.1126/science.abh2644
  • 2 Hussein IH, Chams N, Chams S, El Sayegh S, Badran R, Raad M, et al. Vaccines through centuries: major cornerstones of global health. Front Public Health. 2015 Nov 26;3:269. https://doi.org/10.3389/fpubh.2015.00269
  • 3 Andre FE, Booy R, Bock HL, Clemens J, Datta SK, John TJ, et al. Vaccination greatly reduces disease, disability, death and inequity worldwide. Bull World Health Organ. 2008 Feb;86(2):140-6. https://doi.org/10.2471/blt.07.040089
  • 4 Murphy K, Weaver C. Janeway’s Immunobiology. 9th edition. New York (NY): Garland Science; 2017. 887p.
  • 5 Brasil, Ministério da Saúde. Instrução normativa referente ao Calendário de Vacinação 2020 [Internet]. 2020 [cited 2021 Mar 2];2:1-28. Available from: https://www.saude.gov.br/images/pdf/2020/marco/04/Instru----o-Normativa-Calend--rio-Vacinal-2020.pdf
  • 6 Rubin LG, Levin MJ, Ljungman P, Davies EG, Avery R, Tombly M, et al. Executive summary: 2013 IDSA clinical practice guideline for vaccination of the immunocompromised host. Clin Infect Dis. 2014 Feb 1;58:309-18. https://doi.org/10.1093/cid/cit816
  • 7 Montassier HJ. Vacinas e imunoterapia [Internet]. 2015 [cited 2021 Jan 10]. Available from: https://www.fcav.unesp.br/Home/departamentos/patologia/HELIOJOSEMONTASSIER/aula-12--vacinas-e-imunoterapia.pdf
  • 8 Ciotti JR, Valtcheva MV, Cross AH. Effects of MS disease-modifying therapies on responses to vaccinations: a review. Mult Scler Relat Disord. 2020 Oct 1;45:102439. https://doi.org/10.1016/j.msard.2020.102439
  • 9 Miller ER, Moro PL, Cano M, Shimabukuro TT. Deaths following vaccination: What does the evidence show? Vaccine. 2015 Jun 26;33(29):3288-92. https://doi.org/10.1016/j.vaccine.2015.05.023
  • 10 Reyes S, Ramsay M, Ladhani S, Amirthalingam G, Singh N, Cores C, et al. Protecting people with multiple sclerosis through vaccination. Pract Neurol. 2020 Dec;20(6):435-45. https://doi.org/10.1136/practneurol-2020-002527
  • 11 Farez MF, Correale J, Armstrong MJ, Rae-Grant A, Gloss D, Donley D, et al. Practice guideline update summary: vaccine-preventable infections and immunization in multiple sclerosis: report of the guideline development, dissemination, and implementation subcommittee of the American Academy of Neurology. Neurology. 2019 Sep 24;93(13):584-94. https://doi.org/10.1212/WNL.2021016220210162815
  • 12 Brasil, Ministério da Saúde. Manual dos centros de referência para imunobiológicos especiais [Internet]. 5th ed. Brasília: Ministério da Saúde; 2019 [cited 2021 Mar 10]. 174p. Available from: http://bvsms.saude.gov.br/bvs/publicacoes/manual_centros_imunobiologicos_%0Aespeciais_5ed.pdf
  • 13 Lebrun C, Vukusic S. Immunization and multiple sclerosis: recommendations from the French Multiple Sclerosis Society. Rev Neurol (Paris). 2019 Jun;175(6):341-57. https://doi.org/10.1016/j.neurol.2019.04.001
  • 14 Mokhtarian F, Shirazian D, Morgante L, Miller A, Grob D, Lichstein E. Influenza virus vaccination of patients with multiple sclerosis. Mult Scler J. 1997 Aug 1;3(4):243-7. https://doi.org/10.1177/135245859700300405
  • 15 Zrzavy T, Kollaritsch H, Rommer PS, Boxberger N, Loebermann M, Wimmer I, et al. Vaccination in multiple sclerosis: Friend or foe? Front Immunol. 2019 Aug 7;10:1883. https://doi.org/10.3389/fimmu.2019.01883
  • 16 Bar-Or A, Freedman MS, Kremenchutzky M, Menguy-Vacheron F, Bauer D, Jodl S, et al. Teriflunomide effect on immune response to influenza vaccine in patients with multiple sclerosis. Neurology. 2013 Aug 6;81(6):552-8. https://doi.org/10.1212/WNL.0b013e31829e6fbf
  • 17 Olberg HK, Eide GE, Cox RJ, Jul-Larsen Å, Lartey SL, Vedeler CA, et al. Antibody response to seasonal influenza vaccination in patients with multiple sclerosis receiving immunomodulatory therapy. Eur J Neurol. 2018 Mar;25(3):527-34. https://doi.org/10.1111/ene.13537
  • 18 Bar-Or A, Wiendl H, Miller B, Benamor M, Truffinet P, Church M, et al. Randomized study of teriflunomide effects on immune responses to neoantigen and recall antigens. Neurol Neuroimmunol Neuroinflammation. 2015 Feb 12;2(2):e70. https://doi.org/10.1212/NXI.20210162202101620070
  • 19 Von Hehn C, Howard J, Liu S, Meka V, Pultz J, Mehta D, et al. Immune response to vaccines is maintained in patients treated with dimethyl fumarate. Neurol Neuroimmunol Neuroinflammation. 2017 Nov 15;5(1):e409. https://doi.org/10.1212/NXI.20210162202101620409
  • 20 Kappos L, Mehling M, Arroyo R, Izquierdo G, Selmaj K, Curovic-Perisic V, et al. Randomized trial of vaccination in fingolimod-treated patients with multiple sclerosis. Neurology. 2015 Mar 3;84(9):872-9. https://doi.org/10.1212/WNL.20210162202101621302
  • 21 Metze C, Winkelmann A, Loebermann M, Hecker M, Schweiger B, Reisinger EC, et al. Immunogenicity and predictors of response to a single dose trivalent seasonal influenza vaccine in multiple sclerosis patients receiving disease-modifying therapies. CNS Neurosci Ther. 2019 Feb;25(2):245-54. https://doi.org/10.1111/cns.13034
  • 22 Mehling M, Hilbert P, Fritz S, Durovic B, Eichin D, Gasser O, et al. Antigen-specific adaptive immune responses in fingolimod-treated multiple sclerosis patients. Ann Neurol. 2011 Feb;69(2):408-13. https://doi.org/10.1002/ana.22352
  • 23 Signoriello E, Bonavita S, Sinisi L, Russo CV, Maniscalco GT, Casertano S, et al. Is antibody titer useful to verify the immunization after VZV vaccine in MS patients treated with fingolimod? A case series. Mult Scler Relat Disord. 2020 May;40:101963. https://doi.org/10.1016/j.msard.2020.101963
  • 24 Kaufman M, Pardo G, Rossman H, Sweetser MT, Forrestal F, Duda P. Natalizumab treatment shows no clinically meaningful effects on immunization responses in patients with relapsing-remitting multiple sclerosis. J Neurol Sci. 2014 Jun 15;341(1-2):P22-7. https://doi.org/10.1016/j.jns.2014.03.035
  • 25 Olberg HK, Cox RJ, Nostbakken JK, Aarseth JH, Vedeler CA, Myhr KM. Immunotherapies influence the influenza vaccination response in multiple sclerosis patients: an explorative study. Mult Scler. 2014 Jul 1;20(8):1074-80. https://doi.org/10.1177/1352458513513970
  • 26 Bar-Or A, Calkwood JC, Chognot C, Evershed J, Fox EJ, Herman A, et al. Effect of ocrelizumab on vaccine responses in patients with multiple sclerosis: the VELOCE study. Neurology. 2020 Oct;95(14):e1999-2008. https://doi.org/10.1212/WNL.202101620000010380
  • 27 McCarthy CL, Tuohy O, Compston DAS, Kumararatne DS, Coles AJ, Jones JL. Immune competence after alemtuzumab treatment of multiple sclerosis. Neurology. 2013 Sep 3;81(10):872-6. https://doi.org/10.1212/WNL.0b013e3182a35215
  • 28 Roy S, Boschert U. P059 - Analysis of influenza and varicella zoster virus vaccine antibody titers in patients with relapsing multiple sclerosis treated with cladribine tablets [Internet]. ACTRIMS Forum Virtual. 2021 [cited 2021 May 15]. Available from: https://www.abstractsonline.com/pp8/#!/9245/presentation/160
  • 29 Bingham CO, Looney RJ, Deodhar A, Halsey N, Greenwald M, Codding C, et al. Immunization responses in rheumatoid arthritis patients treated with rituximab: results from a controlled clinical trial. Arthritis Rheum. 2010 Jan;62(1):64-74. https://doi.org/10.1002/art.2503
  • 30 van Assen S, Holvast A, Benne CA, Posthumus MD, van Leeuwen MA, Voskuyl AE, et al. Humoral responses after influenza vaccination are severely reduced in patients with rheumatoid arthritis treated with rituximab. Arthritis Rheum. 2010 Jan;62(1):75-81. https://doi.org/10.1002/art.25033
  • 31 Eisenberg RA, Jawad AF, Boyer J, Maurer K, McDonald K, Prak ETL, et al. Rituximab-treated patients have a poor response to influenza vaccination. J Clin Immunol. 2013 Feb;33(2):388-96. https://doi.org/10.1007/s10875-012-9813-x
  • 32 Kim W, Kim S-H, Huh S-Y, Kong S-Y, Choi YJ, Cheong HJ, et al. Reduced antibody formation after influenza vaccination in patients with neuromyelitis optica spectrum disorder treated with rituximab. Eur J Neurol. 2013 Jun;20(6):975-80. https://doi.org/10.1111/ene.12132
  • 33 Dotan I, Werner L, Vigodman S, Agarwal S, Pfeffer J, Horowitz N, et al. Normal response to vaccines in inflammatory bowel disease patients treated with thiopurines. Inflamm Bowel Dis. 2012 Feb 1;18(2):261-8. https://doi.org/10.1002/ibd.21688
  • 34 Andrade P, Santos-Antunes J, Rodrigues S, Lopes S, Macedo G. Treatment with infliximab or azathioprine negatively impact the efficacy of hepatitis B vaccine in inflammatory bowel disease patients. J Gastroenterol Hepatol. 2015 Nov;30(11):1591-5. https://doi.org/10.1111/jgh.13001
  • 35 McMahan ZH, Bingham CO 3rd. Effects of biological and non-biological immunomodulatory therapies on the immunogenicity of vaccines in patients with rheumatic diseases. Arthritis Res Ther. 2014 Dec 23;16(6):506. https://doi.org/10.1186/s13075-014-0506-0
  • 36 Kapetanovic MC, Roseman C, Jönsson G, Truedsson L, Saxne T, Geborek P. Antibody response is reduced following vaccination with 7-valent conjugate pneumococcal vaccine in adult methotrexate-treated patients with established arthritis, but not those treated with tumor necrosis factor inhibitors. Arthritis Rheum. 2011 Dec;63(12):3723-32. https://doi.org/10.1002/art.30580
  • 37 van Aalst M, Langedijk AC, Spijker R, de Bree GJ, Grobusch MP, Goorhuis A. The effect of immunosuppressive agents on immunogenicity of pneumococcal vaccination: a systematic review and meta-analysis. Vaccine. 2018 Sep 18;36(39):5832-45. https://doi.org/10.1016/j.vaccine.2018.07.039
  • 38 Park JK, Lee YJ, Shin K, Ha Y-J, Lee EY, Song YW, et al. Impact of temporary methotrexate discontinuation for 2 weeks on immunogenicity of seasonal influenza vaccination in patients with rheumatoid arthritis: a randomised clinical trial. Ann Rheum Dis. 2018 Jun;77(6):898-904. http://doi.org/10.1136/annrheumdis-2018-213222
  • 39 WHO. Coronavirus (COVID-19) Dashboard [Internet]. World Health Organization; 2021 [cited 2021 May 15]. Available from: https://covid19.who.int/
  • 40 Brownlee W, Bourdette D, Broadley S, Killestein J, Ciccarelli O. Treating multiple sclerosis and neuromyelitis optica spectrum disorder during the COVID-19 pandemic. Neurology. 2020 Jun 2;94(22):949-52. http://doi.org/10.1212/WNL.20210162202101629507
  • 41 Vetter V, Denizer G, Friedland LR, Krishnan J, Shapiro M. Understanding modern-day vaccines: what you need to know. Ann Med. 2018 Mar;50(2):110-20. https://doi.org/10.1080/07853890.2017.1407035
  • 42 van Riel D, de Wit E. Next-generation vaccine platforms for COVID-19. Nat Mater. 2020 Aug;19(8):810-2. https://doi.org/10.1038/s41563-020-0746-0
  • 43 REDONE.br - Neuroimmunology Brazilian Study Group Focused on COVID-19 and MS. Incidence and clinical outcome of Coronavirus disease 2019 in a cohort of 11,560 Brazilian patients with multiple sclerosis. Mult Scler J. 2021 Feb 2;1352458520978354. https://doi.org/10.1177/1352458520978354
  • 44 Shimabukuro T. COVID-19 vaccine safety update [Internet]. National Center for Immunization & Respiratory Diseases, Centers for Disease Control and Prevention; 2021 [cited 2021 May 20]. Available from: https://www.cdc.gov/vaccines/acip/meetings/downloads/slides-2021-01/06-covid-shimabukuro.pdf
  • 45 Agência Nacional de Vigilância Sanitária. Vacina COVID-19 (recombinante) [Internet]. FIOCRUZ; 2021 [cited 2021 May 20]. Available from: https://consultas.anvisa.gov.br/#/bulario/q/?nomeProduto=VACINA COVID-19
  • 46 Instituto Butantan. Vacina adsorvida COVID-19 (inativada) [Internet]. 2021 [cited 2021 May 20]. Available from: https://vacinacovid.butantan.gov.br/bulas