What are some communical diseases?

Here are some examples of communicable diseases:

* Colds and flu, caused by viruses

* Chickenpox and measles, caused by viruses

* Tuberculosis, caused by bacteria

* Meningitis, caused by bacteria or viruses

* Gonorrhea and syphilis, caused by bacteria

* HIV and AIDS, caused by a virus

* Malaria and yellow fever, caused by parasites

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