Widespread outbreaks of novel (new) coronavirus infection have occurred in each of the past two decades, and the current outbreak poses the third threat of a severe novel coronavirus epidemic on a global scale.

Bronchiolitis caused by respiratory syncytial virus (RSV) infection in infants is common and can lead to hospitalization if severe. There are now two ways to prevent this: immunizing the mother during pregnancy or giving monoclonal antibodies.

This module reviews the population health impact of vaccinations on the community.

Opioid use disorder is a chronic, relapsing disease with physical and psychiatric components. It is associated with economic hardship, social isolation, incarceration, increased rates of blood-borne infections such as HIV and viral hepatitis, adverse pregnancy outcomes, and increased mortality.