Flu, RSV, and COVID-19 are common illnesses caused by viruses. They tend to spread more in the fall and winter. Getting vaccinated lowers your risk of getting sick. If you do get sick, being vaccinated also lowers your risk of serious illness.
Cancer and cancer treatment can weaken your immune system, which is your body’s defense against infection. This is called being immunocompromised. When your immune system is weakened, it’s harder for your body to fight off these viruses, and they’re more likely to make you very sick.
Learn more about each vaccine
Our experts answer common questions about each one.
- What People With Cancer Should Know About the 2026–27 Flu Season
- Five Myths About the Flu Shot
- What To Know About the RSV Vaccines: Who Can Get Them, Side Effects, and Availability at MSK
- 2026–2027 COVID-19 Vaccine for People With Cancer & Others With Weakened Immune Systems
Which vaccines should I get?
It depends on your age, health, and treatment. Talk with your care team. They’ll tell you which vaccines to get and the best time to get them.
Where can I get my vaccines?
You can get them at MSK. Just ask your care team. You can also get them at most pharmacies.
Should the people I live with get vaccinated too?
Yes. When the people in your home and close circle get vaccinated, it helps protect both you and them. Encourage your family, caregivers, and close friends to stay up to date on their vaccines.