Organ transplant, HIV infection, long-term immunosuppressant use — all of these lower immunity. Immunocompromised people face a higher risk of complications from infection, so they need the protection of vaccines all the more. The key is choosing the right type.
Principle 1: inactivated vaccines — usually fine
Inactivated and recombinant vaccines (such as inactivated flu, pneumococcal and hepatitis B vaccines) contain no live pathogen, so they can't cause the disease. They're relatively safe for immunocompromised people and are the main source of protection.
Principle 2: live vaccines — generally avoided
Live attenuated vaccines (for example the nasal live attenuated flu vaccine, and some travel vaccines such as yellow fever) contain a weakened but live pathogen, which can cause problems when immunity is seriously suppressed; they're generally contraindicated. If you have travel or other special needs, always consult your doctor first.
Protection may be weaker, or need extra doses
The antibody response after vaccination may be lower than in the general population. Extra or booster doses are therefore sometimes needed — immunocompromised people, for instance, usually need more COVID-19 doses than others. The specifics are decided by your doctor based on your immune status.
"Cocoon" protection: vaccinate the household
Because you may not mount full protection yourself, having household members get suitable vaccines (such as the flu vaccine) creates a protective "cocoon" that lowers the chance of someone bringing a virus home — an important complementary strategy.
What to do
Take your medical history and current medication list to your treating doctor and work out a personalised plan: which vaccines to have, which to avoid, when, and whether extra doses are needed. Don't decide or self-administer on your own.
This article is general information and is not a substitute for professional medical advice. Vaccination for immunocompromised people must be decided by the treating doctor for the individual.