Infection*	Source patient's disease status	Status of exposed person	Regimen
Hepatitis A virus	Serologically confirmed case within incubation period until one week after onset of jaundice	Unvaccinated	A single dose of hepatitis A vaccine within two weeks of exposure
		Unvaccinated, immunocompromised, chronic liver disease, younger than 12 months, or severe allergy to vaccine	A single dose of immune globulin (0.02 mL per kg IM) within two weeks of exposure
Varicella zoster virus	From one to two days before onset of rash until after all lesions have crusted	Nonimmune (i.e., no history of varicella and negative serology) who has not received two doses of vaccine	Healthy persons: varicella vaccine within five days of exposure
			Pregnant women, neonates, or immunocompromised persons: varicella zoster immune globulin (125 units per 10 kg IM) as soon as possible (up to 10 days postexposure), or immune globulin (400 mg per kg IV) if varicella zoster immune globulin is unavailable
Influenza	From one day before onset of symptoms until one day after defervescence (may be longer for immunocompromised patients)	High-risk group†	Unvaccinated persons: influenza vaccine
Rabies	Bites or scratches from a suspected rabid animal; contamination of a mucous membrane or open wound with saliva or central nervous system tissue from a suspected rabid animal‡	Previously unvaccinated	Rabies vaccine should be given as early as possible on days 0, 3, 7, and 14 postexposure, in addition to human rabies immune globulin (20 units per kg in a single dose) on day 0. Rabies immune globulin should be infiltrated around the wounds first if anatomically feasible, with the rest administered IM into the gluteal region. If the person is immunocompromised, a fifth dose of rabies vaccine should be given on day 28.§
		Previously vaccinated||	Rabies vaccine only on days 0 and 3 with documentation of protective neutralizing antibodies (> 0.5 IU per mL); otherwise give vaccine on days 0, 3, 7, 14, and 28 postexposure