Which virus is known to not be associated with serious sequelae during pregnancy?

Rhinovirus is known for being one of the most common viral causes of upper respiratory infections, such as the common cold. In the context of pregnancy, rhinovirus typically does not lead to serious complications or sequelae for the mother or fetus. While it can cause discomfort and mild respiratory symptoms, it is generally self-limiting and does not have a significant impact on pregnancy outcomes.

On the other hand, the other viruses mentioned have stronger associations with complications in pregnant individuals. Human parvovirus B19 can cause fetal anemia and other complications. Rubella is associated with serious congenital defects if infection occurs during the first trimester. Varicella (chickenpox) can also lead to significant issues, including congenital varicella syndrome if contracted during pregnancy. Understanding the relative risks associated with these viruses is key when considering maternal health and fetal development during pregnancy.