Peptide vaccines: These also train the immune system to recognize proteins associated with the HIV virus.

FORBES: HIV Vaccines: The Shotgun Approach

Scientists had attempted to model a 3D structure of a protein associated with the HIV virus for 15 years and failed.

FORBES: Practical Implications

Experts have said many of the head and neck tumours they are seeing contain the human papilloma virus (HPV) which is more commonly associated with cervical cancer and, according to Cancer Research UK, can be passed on through kissing.

BBC: Radiotherapy mask

The H7N9 virus, previously known only to infect birds, appears to have mutated so that it can more easily jump to animals like pigs, meaning the range of potential hosts has expanded, the Associated Press reported Wednesday, citing a World Health Organization scientist studying the virus's genetic makeup.

WSJ: China Bird Flu Cases Fuel Fears of Epidemic

Infection by a virus called the human herpesvirus 8 (HHV-8) is associated with Castleman disease, and doctors suspect that it may play a role, especially in multicentric Castleman disease.

CNN: Castleman disease