How do vaccines work? Here's what medical experts want you to know about safety and efficacy.

Dr. Brownfield answers the question: 'What Is A Nasal Spray Flu Vaccine?' — -- Question: What is a nasal spray flu vaccine, how does it work and what are the side effects? Answer: FluMist is a ...

Vaccine side effects like soreness, fever, and fatigue scare some people out of getting their shots. Ask a doctor, though, and they’ll tell you these unpleasant symptoms have a silver lining: they’re ...

Hepatitis B is a potentially fatal liver disease. It spreads through contact with bodily fluids, and certain groups including health care workers and IV drug users are at higher risk. Anyone can be ...

Scientists at Stanford University say they are developing a single nasal spray vaccine that could protect against coughs, ...

DEAR DR. ROACH: My daughter was recently visiting and tested positive for COVID. Since my last COVID vaccine was eight months ago, I searched for how much protection I still had and understood the ...