The most common communicable diseases are?

* Colds and flu. These are caused by viruses and are spread through contact with respiratory droplets from an infected person.

* Diarrhea. This can be caused by viruses, bacteria, or parasites and is spread through contaminated food or water.

* Measles, mumps, and rubella. These are viral diseases that are spread through contact with respiratory droplets from an infected person.

* Chickenpox and shingles. These are caused by the varicella-zoster virus and are spread through contact with the blisters of an infected person.

* Whooping cough. This is a bacterial infection that is spread through contact with respiratory droplets from an infected person.

* Meningitis. This is a bacterial or viral infection of the meninges, the membranes that surround the brain and spinal cord. It is spread through contact with respiratory droplets from an infected person.

* HIV/AIDS. This is a viral infection that attacks the body's immune system. It is spread through contact with infected blood, semen, or vaginal fluids.

* Tuberculosis (TB). This is a bacterial infection that usually attacks the lungs. It is spread through contact with respiratory droplets from an infected person.

* Malaria. This is a parasitic infection that is spread through the bite of an infected mosquito.

* Dengue fever. This is a viral infection that is spread through the bite of an infected mosquito.