Immunity and infections

Influenza is a respiratory infection that can last approximately one to two weeks. It is very contagious and symptoms can...

Chickenpox used to be a very common infection in the US. In the early 1990s, about four million Amercians were...

Lyme disease, or Lyme borreliosis, is a serious infection caused by bacteria. It's transmitted to humans through the bite of...

Human papillomavirus (HPV) is the most common sexually transmitted infection (STI). Nearly everyone becomes infected with HPV within the first...

Cystitis is inflammation of the bladder that can result in irritation and pain. Generally, bacteria cause infection in the bladder,...