Lots of people suggest guzzling a tall glass of H2O before the injection. But is there any evidence it'll reduce side effects or improve vaccine effectiveness? Also: painkiller protocols!

With all the talk about COVID-19 vaccines and boosters, it's easy to forget that there's another respiratory virus poised to strike. We tackle questions about why a flu vaccine matters now.

Interest in international air travel is rising. If you're want to fly out of or into the United States, there's a lot you need to know. Here are answers to key questions.

There's a lot of room for dangerous misunderstanding when doctors and public health officials talk to diverse groups about COVID-19. Health literacy projects aim to dispel confusion in all languages.

The short answer is — no. Immunology experts say there is little to be gained, for now, from an antibody test, for a number of reasons.

Let's say you are vaccinated. Do you have to tell everybody? Anybody? Is it legal (and ethical) not to share?

That's when a vaccine for plague was invented — and authorities began to consider requiring proof of vaccination before visiting pilgrimage sites in India. The debate has raged ever since.

A new study in The Lancet Planetary Health finds that cultural attitudes may explain the stark differences in how countries experience the pandemic.

As the first COVID-19 vaccines begin to be rolled out across the U.S., community leaders in diverse groups already are working hard to dispel misinformation and reach skeptics with truth.

That's a question people are asking as the Supreme Court hears oral arguments for a case on the future of the Affordable Care Act — which guarantees coverage for preexisting conditions.

Can rubbing hand sanitizer inside the nostrils help reduce infection? Can spraying Lysol in a room every hour or so disinfect the air? Plus: a primer on how to use hand sanitizer effectively.

Dr. Omar Ibrahim went from Aleppo to Idlib province in Syria to continue treating injuries from shelling. Now, after six years of doing surgery in a war zone, he is starting a new chapter in his life.

A study seeks to learn how hundreds of thousands of Jews, crammed in the ghetto by the Nazis, halted an outbreak of epidemic typhus. Some — including survivors alive today — say frame of mind was key.

With the flu season looming, public health officials urge nearly all Americans over 6 months old to get immunized starting next month. Strategize now to avoid getting the flu while COVID-19 is raging.

Dentists spend their careers eye to eye with infectious patients, their hands inside gaping mouths, and have a vested interest in making sure everyone stays safe. Here's how they do it.

A report on the impact of the novel coronavirus on the children of South Asia pays special note to reports of adolescent suicide — and looks at preventive measures.

With fear of infection on our minds these days, it's easy to get panicky about everyday choices. Infectious disease and food safety experts weigh in on ordering dinner to go.

These designations are often used to describe a patient's COVID-19 symptoms. At this stage of the outbreak, there aren't standard definitions, but there are preliminary guidelines.

As fighting escalates in northwest Syria, the U.N. estimates that thousands of Syrians are being displaced every day.

We asked epidemiologists and doctors to assess the science in the 2011 movie, in which the character played by Gwyneth Paltrow starts a global pandemic. Spoiler alert: It does a pretty good job.