This document looks at HIV and AIDS in Commonwealth countries and in particular the impact of HIV and AIDS on teachers. Slightly more than half of those who are infected are women. This has implications for the teaching profession and the delivery of educational services, since a high percentage of teachers, especially those in pre-schools and primary schools, are female. There is a potential loss of teachers in terms of sickness and deaths. There are also constraints on the freedom of educational managers to post women teachers to remote rural schools (where their services may be very badly needed) because of the possible need of infected teachers to be stationed fairly close to clinics where they can access the monitoring, treatment and drugs that their condition may require. The situation also has implications for teachers' ability to be professionally productive. This can be adversely affected by HIV infection, at least until such time as the infected teacher has succeeded in coming to terms with her or his sero-positive status.