Final answer:
Healthcare workers are required to vaccinate against several viruses, particularly Hepatitis B, due to high risks of occupational exposure. Vaccination against influenza is also required annually because of the virus's high mutation rate. The MMR vaccine for measles, mumps, and rubella is essential for those in contact with vulnerable patients.
Step-by-step explanation:
Healthcare workers are often required to vaccinate against several viruses to protect themselves and their patients. One significant virus for which vaccination is mandated is the Hepatitis B virus (HBV). The Centers for Disease Control and Prevention (CDC) recommended HBV vaccination for healthcare workers in 1982 due to the high risk of on-the-job exposure and the serious consequences of infection, including cirrhosis and liver cancer.
Moreover, healthcare workers may also be required to get vaccinated for viruses such as influenza, due to its high mutation rate and the ability to rapidly mutate through antigenic drift and antigenic shift. Additionally, vaccines for measles, mumps, and rubella (MMR) are important as well, especially for those in contact with young or immunocompromised patients, to prevent potential outbreaks. Vaccines for these viruses are stable over time, unlike the influenza vaccine, which is redeveloped annually to keep up with viral mutations.