Mpox, a virus known for causing flu-like symptoms and painful sores, has a new, more severe strain spreading in California. This strain, called Clade 1, has been found in three people who hadn't traveled outside the U. S. It's the first time this strain has spread locally in the country. Clade 1 is not new. It has been causing infections and deaths in Africa for yea...

In a surprising turn of events, San Mateo County health officials announced the first case of clade I mpox in California and the entire United States on Saturday. The patient contracted the virus while traveling in Eastern Africa, where an outbreak of this strain is currently happening. Up until now, the U. S. has been dealing with a different strain, known as clade ...