title: Flu vaccine. Vaccine shortage threatens HIV-positive.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D015658:HIV Infections / Q000150:complications*; D006801:Humans; D007223:Infant; D007252:Influenza Vaccines / Q000600:supply & distribution*; D007251:Influenza, Human / Q000150:complications* / Q000517:prevention & control; D008875:Middle Aged
chemical_list: D007252:Influenza Vaccines