Live attenuated vaccines should be used with caution in pregnant women, but the actual risk to the fetus is still theoretical. Many studies have shown that even when pregnant women (who do not know they are pregnant) receive rubella vaccine, there is no increased risk of birth defects.

This article provides additional information about vaccination guidelines recommended by the Centers for Disease Control and Prevention (CDC).

There are many different types of vaccines, each with different uses, storage, and adverse reactions. The article below will help you gain more information and better understand vaccines.

Hypersensitivity is the body's immune system being stimulated to produce antibodies against pathogens. So what is hypersensitivity and what types of hypersensitivity are there?