Measles parties echo chicken pox parties from decades ago, when people would deliberately expose themselves or others to someone with a confirmed case in an attempt to spread the virus in a controlled environment. The chicken pox vaccine was introduced to the public in 1995, largely ending the practice.

Texas is in the midst of the worst measles outbreak in decades, with 90 cases across 7 counties. Here’s what to know.

Measles was considered to be eliminted in the U.S. in 2000, thanks to vaccine developments. But vaccination rates have dropped since the covid pandemic began.