Johns Hopkins School of Medicine Professor Dr. Marty Makary weighs in on whether Americans should be concerned about the rise in both COVID cases and Dengue fever in the U.S.

and discusses Potassium Chloride meds being recalled for heart risks. Health officials in Los Angeles County, California, on Wednesday warned of an "unprecedented" rise in dengue fever among residents who have not traveled out of the country. At least three cases of dengue have been reported in residents in the Baldwin Park neighborhood east of downtown Los Angeles after they were bitten by local mosquitoes, Los Angeles County public health officials said.

"This is an unprecedented cluster of locally acquired dengue for a region where dengue has not previously been transmitted by mosquitoes," said Barbara Ferrer, director of the Los Angeles County Department of Public Health. Dengue is typically acquired after traveling abroad to a country where dengue is commonly spread. The first locally acquired case in California was reported a year ago.

CDC WARNS OF MOSQUITO-DRIVEN VIRUS AS CASES SPIKE Dengue fever typically spreads through mosquito bites in countries where dengue is common. (iStock) Dengue spread from mosquito bites within the U.S.

has been reported this year in Florida, the U.S. Virgin Islands and Puerto Rico, where officials have declared a dengue epidemic.

There have been 3,085 such cases in the U.S. this year, of which 96% were in Puerto Rico, according to the U.

S. Centers for Disease Control a.