simmer(Noun) The state or process of simmering. The kettle was kept on the simmer. simmer(Verb) To cook or undergo heating slowly at or below the boiling point. The soup simmered on the stove. simmer(Verb) To cause to cook or to cause to undergo heating slowly at or below the boiling point. Simmer the soup for five minutes, then serve.
Some diseases caused by viruses are poliomyelitis, influenza, measles caused by rubeola virus, chikenguniya caused by chikanguniya virus, chickenpox caused by varicella zoster â¦ virus, AIDS caused by human immunodeficiency virus, and the common cold.
Virus spread control. Viral diseases can be prevented from spreading by vaccinations and the most successful of these is the small pox vaccine that has completely eradicated the disease in 1980. It is hoped that several other viruses, such as polio and measles, will follow. special category of viruses is those that cause disease only when the immune system is deï¬cient in some way; these are called opportunists, and opportunistic infection is one of the main problems in patients with, for example, AIDS.