'By expanding the vaccine offer to those at higher risk, we hope to break chains of transmission and help contain the outbreak,' said the Health Security Agency's head of immunization, Dr. British health officials will start offering vaccines to some men who are gay or bisexual or have sex with men, who are at the highest risk of catching monkeypox, in an effort to curb the biggest outbreak of the disease beyond Africa.īritain's Health Security Agency said in a statement on Tuesday that doctors could consider vaccination for some men who are gay or bisexual and men who have sex with men at the highest risk of exposure, whom they defined as people with 'multiple partners, (who participate) in group sex or (attend) `sex on premises' venues.'