The appearance of antibodies against causative agents in the blood of individuals during the course of an infection or following immunization.
    

concept

Fever, sore throat, aches, rash, unsafe sex : if you've had sex without a condom and show three or more of these symptoms within six weeks, it's possible you've now got HIV : in some cases there are no symptoms, but you may still be infected / Terrence Higgins Trust ; GMFA.

Please note, our Changing Places toilet is currently out of service and undergoing repair works.

We're running paid user research studies to improve Wellcome Collection online