Medically reviewed by Michael Menna, DO The flu usually starts quickly.Severe flu cases can lead to pneumonia, with symptoms such as chest pain, cough, and difficulty breathing.Children under 2 years ...

If you grew up with a parent rubbing something cool and menthol-scented on your chest when you had a cold, you’re far from alone. For more than a century, VapoRub has been a household staple, earning ...