Can a weakened immune system prevent someone from getting vaccinated?
For people with immunocompromised systems, vaccination against infectious diseases requires careful planning and consideration. Conditions such as rheumatoid arthritis, Crohn's disease, and the use of biologics and monoclonal antibodies can pose specific risks and challenges.
Live Vaccines: A Potential Risk
Immunocompromised patients are generally advised against receiving live-attenuated vaccines, as these vaccines contain weakened but live organisms that can cause severe or even fatal infections in these individuals. This includes people on immunosuppressive therapies such as high-dose corticosteroids, antimetabolites, immune modulators (including biologics and monoclonal antibodies), and others used in rheumatologic and gastrointestinal disorders.
Timing and Safety
For patients receiving immunosuppressive therapy, live vaccines should be withheld until the immune system recovers after treatment. The recovery interval depends on the specific therapy used. Decisions about vaccination or revaccination require discussion with infectious disease specialists to weigh risks and benefits.
Reduced Vaccine Efficacy
Immunocompromised patients often have a weakened immune response to vaccines, meaning vaccines may be less effective in providing protection. For example, patients with conditions like cancer or on strong immunosuppressants may have reduced responses to COVID-19 vaccines and related boosters, but vaccination still offers significant protection against severe disease and hospitalization.
Increased Risk from Vaccine-Preventable Diseases
Despite these concerns, immunocompromised individuals are at a higher risk of severe outcomes from infections preventable by vaccines, making vaccination critical with appropriate precautions and vaccine choices.
Preferred Vaccines: Inactivated and Subunit
Inactivated vaccines or subunit vaccines (which do not contain live agents) are generally considered safe and recommended for immunocompromised patients, including those with autoimmune diseases or on biologics, because they cannot cause infection.
In summary, the main risks for these patients are potential severe infections from live vaccines and reduced vaccine effectiveness. The chief consideration is balancing the risk of disease against vaccine safety, typically favoring inactivated vaccines and careful timing relative to immunosuppressive treatments. Coordination with healthcare providers, including infectious disease specialists, is essential for personalized vaccine planning.
COVID-19 Vaccines: A Special Case
All COVID-19 vaccines currently available in the U.S. are inactivated, meaning it's impossible to contract COVID-19 from them. The U.S. Centers for Disease Control and Prevention recommends all people over age 6, including those who are moderately or severely immunocompromised, to get and stay up-to-date with COVID-19 vaccines.
While vaccines are not always off-limits for immunocompromised individuals, certain factors need to be considered when determining which vaccines to receive. Medications like biologics and monoclonal antibodies can suppress the immune system, potentially reducing the effectiveness of some vaccines. It's crucial to discuss each potential vaccine and alternative prevention methods with your doctor to make an informed decision. Regular check-ins with your primary care provider are also essential to see if there have been any changes that could impact your vaccine eligibility.
[1] Centers for Disease Control and Prevention. (2021). Vaccines and People with Weakened Immune Systems. Retrieved from https://www.cdc.gov/vaccines/vac-gen/immunocomp.htm
[2] National Institute of Allergy and Infectious Diseases. (2021). COVID-19 Vaccines and Immunocompromised People. Retrieved from https://www.niaid.nih.gov/diseases-conditions/covid-19-vaccines-and-immunocompromised-people
[5] Centers for Disease Control and Prevention. (2021). COVID-19 Vaccines for People Who Use Immunosuppressive Medicines or Have Conditions That Weaken Their Immune System. Retrieved from https://www.cdc.gov/coronavirus/2019-ncov/vaccines/recommendations/immunocompromised-condition.html
- Live vaccines can potentially cause severe or even fatal infections in immunocompromised patients, including those with rheumatoid arthritis, Crohn's disease, or on immunosuppressive therapies like biologics and monoclonal antibodies.
- People with medical-conditions that weaken their immune system, such as cancer or autoimmune diseases like rheumatoid arthritis, may have reduced responses to some vaccines, but receiving them still offers significant protection against severe disease and hospitalization.
- Immunocompromised individuals, who are at a higher risk of severe outcomes from vaccine-preventable diseases, are strongly advised to get and stay up-to-date with vaccines like the COVID-19 vaccines, which are inactivated and do not cause infection.
