Before receiving injections and 3 and 6 months after injections, patients are tested for HIV, hepatitis B, and hepatitis C with pre- and post-test counseling. Referrals for appropriate medical care are provided. Participants have multiple injections (depending on body weight) of VIG at 1 or 2 clinic visits. Following administration of VIG, participants are observed for 1/2 hour at the clinic. Participants return to the clinic for as many as 10 visits to monitor for any adverse reactions and signs and symptoms of vaccinia infections. On Days 7, 84, and 168 participants return to the clinic for evaluations and have blood drawn to check for the response to the VIG injections.