Health on MSN7d
A Complete Guide to the Different Blood Types: A, B, AB, and O
Medically reviewed by Amelia MacIntyre, DO One of the most important characteristics of blood is its type. Knowing your blood ...
Medscape5d
Positive Hepatitis B Surface Antigen Tests Due to Recent Vaccination
Background Hepatitis B virus (HBV) is a common cause of viral ... to HBsAg testing and also to ascertain likely cause of weakly positive (grayzone) results. Results During the 17 month study ...