Add Yahoo as a preferred source to see more of our stories on Google. Can certain infections, such as COVID, leave you more vulnerable to getting another illness? (Getty Images) (Guido Mieth via Getty ...

Anthony Fauci privately acknowledged “impressive data” showed stronger immunity from a COVID-19 infection than vaccination while publicly pushing mandated shots, ...

There were around 50 separate measles outbreaks across 44 states in 2025, totaling in 2,242 cases, according to the CDC.

People’s immune responses to COVID-19 after inoculation were lower among those who were previously infected with SARS-CoV-2 than those who were not, according to a study the National Institutes of ...

In a recent study published in the Frontiers in Immunology Journal, a group of researchers examined the immune response and potential cross-protection in hospitalized patients with breakthrough ...

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

As scientists learn more about the virus, they say herd immunity won't work. Early in the pandemic, scientists and public health experts leaned on their experience with other viruses to make ...

According to the US Centers for Disease Control and Prevention, two doses of the measles, mumps and rubella, or MMR, vaccine ...

Having a COVID-19 infection can shore up your immunity to the virus, but can it also leave you more susceptible to getting sick with other illnesses? That's the theory laid out in a new scientific ...