A flea-borne disease that can lead to limb amputations is rising rapidly in some part of the US, an official study suggests.
Researchers from the Centers for Disease Control and Prevention (CDC) found that typhus cases caused by fleas have risen by more than tripled in Los Angeles County (LAC), California, since 2010.
CDC doctors said they have not noticed the disease getting more deadly, but it is a possibility and must be monitored. They think the rise has come