Vaccines prevent disease by

Which event listed is most likely to cause a widespread influenza outbreak?

When a virus invades a host the most common threat is

Viruses and bacteria are both microscopic and can both cause disease. Viruses differ from bacteria in that all viruses

Vaccination requirements vary from virus to virus. Some diseases require one vaccination that last for many years. Other diseases like the flu have vaccines that only last one season or year. The flu vaccine last a short time because the flu virus

Some diseases are caused by bacteria, protists, invertebrates or viruses. How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

Some viruses are responsible for cancer in humans. This is due to

Some viruses must insert their genetic material into the host cell's DNA. This is accomplished thanks to enzymes. The virus benefits from this action by

If a country could not get access to a flu vaccine which of the following would occur?

In which cycle does the virus to remain dormant?

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