Measles
Measles is an acute illness caused by morbillivirus. The disease is transmitted via airborne respiratory droplets, or by direct contact with nasal and throat secretions of infected individuals.

Mumps
Mumps is an acute illness caused by the mumps virus. It is characterised by fever and swelling of one or more salivary glands. It is the only cause of epidemic infectious parotitis.

Pertussis
Pertussis is an acute bacterial infection of the respiratory tract caused by the bacterium Bordetella pertussis. The disease is characterised by a severe cough, lasting for two months or even longer.

Rubella
Rubella is a mild febrile rash illness caused by rubella virus. It is transmitted from person to person via droplets. It affects mainly children and when pregnant women are infected, it may result in malformation of the foetus.

Varicella infection (chickenpox)
Chickenpox is caused by the varicella-zoster virus (VZV), which also causes shingles. The virus spreads through the body into the skin causing rashes to appear.