secondary mutation – see minor mutation.
Glossary
Selected words and phrases
cryptococcus (crypto) – a fungal infection. Can cause meningitis.
oesophagus – part of the gut between the throat and the stomach.
coinfection – having more than one infection, eg HIV and TB, or HIV and hepatitis C.
HPV (human papillomavirus) – a family of viruses associated with cervical cancer and anal cancer and genital warts.