Infection
Symptoms: Your character is occasionally grunting, your vision blurs, you have no blood gain and persistent health loss.
Cause: Getting a cut or treating a cut without disinfected bandages.
Cure: Use alcoholic or iodine tincture on the wound to disinfect it but that only works in the early stages of infection. In any case take Tetracycline as that should help it clear up.
Cholera
Symptoms: Your vision blurs, you are being sick and getting dehydrated.
Cause: Drinking unclean water.
Cure: This one takes a few days to cure, use Tetracycline. When you need to eat or drink take small bites or sips to avoid being sick again straight away.
Cold
Symptoms: The only symptoms are sneezing. If you have more than sneezing then its probably flu (influenza)
Cause: The common cold can be caught from other survivors or you can get it by being exposed to the elements i.e. not wearing warm clothes.
Cure: Use Tetracycline. It can go naturally but takes ages so tetracycline is the best method if you can find some.
Flu (influenza)
Symptoms: The main symptoms are coughing but you can sneeze and have a fever too.
Cause: The flu can be caught from other survivors or you can get it by being exposed to the elements i.e. not wearing warm clothes.
Cure: Use Tetracycline. It can go naturally but takes ages so tetracycline is the best method if you can find some.