ACIP recommends that people working in healthcare settings be vaccinated against COVID-19, influenza, hepatitis B, measles, mumps, rubella, varicella, and pertussis. Adults are generally assumed to have been vaccinated against polio in childhood; any adult known or strongly suspected of being unvaccinated against polio should be vaccinated. For measles, mumps, rubella, and varicella, serologic evidence of immunity is an acceptable substitute for documentation of vaccination. In addition, microbiologists working in a laboratory should receive vaccination against meningococcal ACWY and meningococcal serogroup B disease. In rare cases, some laboratory personnel should also receive a single polio vaccine booster and typhoid vaccines. For more information, refer to the current CDC recommended adult immunization schedule or the 2011 ACIP recommendations for immunization of healthcare personnel,?www.cdc.gov/mmwr/pdf/rr/rr6007.pdf.