Influenza infection, while clinically recognized for centuries, remains a significant contributor to morbidity and mortality from febrile respiratory illness. It is an orthomyxovirus with three antigenic types: A, B, and C. Vaccination is the primary method to prevent influenza and its severe complications. West Nile Virus is an anthropod‐borne RNA flavivirus, a member of the Japanese encephalitis virus antigenic complex. The primary strategy for preventing exposure in pregnancy is the use of mosquito repellent containing N, N‐diethyl‐m‐toluamide (DEET). Varicella‐zoster virus (VZV) is a double‐stranded DNA herpes virus acquired predominantly during childhood in the United States, 95% of adults have serologic evidence of immunity. Humans are the only source of infection with VZV. Tuberculosis (TB) is a chronic bacterial infection caused mainly by Mycobacterium tuberculosis, which is transmitted by respiratory droplet and spread from person to person via air. Untreated TB in pregnancy poses a significant threat to the mother and fetus.