Bacteria, viruses, and parasites can cause a wide variety of illnesses, and can infect any of the organs of the body. Viruses are often responsible for respiratory illnesses (such as the common cold) and digestive illnesses (such as diarrhea).
Disability will not pay for any more time off work than that for pregnancy. After that, many employers let you stay off for the full 3 months for maternity leave but the disability cuts off after 6 or 8 weeks, depending on how you delivered. That's not just how Aflac does it, that's how all disability works.
The average human pregnancy is 40 weeks long. However, a pregnancy is considered full term between week 37 of pregnancy and week 42 of pregnancy. Babies born during week 36 of pregnancy or earlier are considered preterm or premature. Babies born during week 43 of pregnancy or after are consider post-term or post-date.