Alpha Team was a U.S.S. (Umbrella Security Service) team of an unspecified size sent to retrieve the G-virus from William Birkin. Two men from Alpha team were tasked with taking Birkin's G sample, whilst the others guarded the sewers.
During their infiltration into Birkin's laboratory, a member of the team opened fire on Birkin, leaving him gravely wounded as they took the briefcase containing the G-virus. Birkin, however, was holding a sample of the virus as the event occurred, injecting himself with it.
Until Resident Evil Outbreak File#2, HUNK was known to be the only Alpha Team survivor. But with it was revealed on a leaked Outbreak character list that Miguel somehow survived the initial attack with a head injury, but was later killed by the mutated Birkin anyway.