Measles can spread through direct or indirect contact with infected persons.

Respiratory system is mostly affected by diseases transmitted through air.

Measles virus is transmitted through the air.

Influenza virus passes into air from nose, throat and lungs of an infected person when he coughs or sneezes. They are expelled in the form of five droplets in air which can infect a healthy person.

Viral (Measles and chickenpox) and fungal diseases spread through direct contact.

Plague spreads through vectors like rat fleas

Tuberculosis spread through air or through indirect contact.

Diphtheria spreads by air in the form of fine droplets.

If the water supplied in towns and cities is not processed properly, cholera outbreak could occur as it is transmitted by water.

Typhoid is transmitted through water. Therefore, using contaminated water can cause typhoid.

Dysentery is caused by amoeba

Dysentery causing organisms are transmitted through water.

Contaminated water may carry eggs and larvae of worms. Usage of contaminated water can lead to worm infections.

Sleeping sickness is caused by Trypanosome

Mumps spread through air droplet infection.

The venom of cobra damages the nervous system

Vectors are organisms which carry source of infection without themselves being infected.

Flies carry germs from garbage and sewage and deposit them on food. This can spread diseases like typhoid, cholera and dysentery.

It is the female anopheles that carries malaria causing protozoan.

Adder is a poisonous snake. It does not act as a vector of any disease.

Culex mosquito spreads filaria.

Rabies spread through bites of animals which are infected by the virus.

Rat flea carries the germs of plague from rats to human beings.

Rabies is carried by dogs, cats, monkeys and raccoons.