How COVID-19 Expanded Substance Abuse | Health Street Learn more about how COVID-19 increased drug abuse and the relationship between drug use and the pandemic.
BCG Vaccine Impact on TB Testing - Health Street Tuberculosis has been stalking humankind for hundreds of years, and has been quite deadly until very recently. A vaccine developed in the early part of the last century, known as the BCG vaccine, is still given to people in many countries. In the USA, where PPD testing is a common diagnostic tool to determine if someone has active TB, a history of BCG vaccination may complicate matters.
