Jeremy Warner has had six shots of the COVID vaccines. He’s an oncologist at Brown University in Providence, Rhode Island, where he treats immunocompromised patients with cancer who are especially ...

You may experience allergy-like symptoms when coming into contact with tobacco and cigarette smoke. This is unlikely to be an allergy to the smoke itself, but rather a trigger to a preexisting ...

Food allergy symptoms can start quickly after eating and may last from minutes to a couple of days. Seasonal allergy symptoms can last for weeks or even months if exposure to the allergen continues.