The minor was a teenager who lived in Lancaster and did not have any preexisting conditions, Los Angeles Mayor Eric Garcetti said in a news briefing Tuesday evening.
As of Tuesday, there had been 662 cases across the entire county, including 11 deaths, with 119 patients hospitalized.
The health department is aware of numerous additional tests that have been sent to state and private labs from medical providers across the valley and is anticipating additional COVID-19 cases to come in.
Public Health is investigating all new cases and will notify close contacts who are household members, intimate partners and healthcare professionals to assess and monitor them for signs and symptoms of illness. AP's earlier story follows below.
"The risk for serious disease and death in Covid-19 cases among persons in the United States increases with age", the CDC report added.
House Democrats release third coronavirus response bill
Schumer had agreed on additional oversight of the funds, according to several people involved in the talks. While the two sides have resolved many issues, some final sticking points remain.
She did not provide any details of the child.
County public health director Barbara Ferrer says it's a 'devastating reminder that Covid-19 affects people of all ages'.
Less than three percent of hospitalisations from coronavirus were due to that age group. The agency also is also working to confirm whether the case marks the first such death of a minor linked to coronavirus in the country, but cases are not always broken down by age, said Tim Gilman, a representative for the department. Additional information regarding some of the new cases is pending further investigation.
A file image of a woman wearing a face mask.
New approach for COVID-19 testing in Alberta targets at-risk populations
The province has set up a program for people and organizations wanting to help people affected by the pandemic. When it comes to testing for COVID-19 there has been some confusion over when to do it, and who qualifies.
Last week, the governor announced a stay-at-home order covering 40 million Californians and closing all nonessential retail businesses. More than 176 people in the USA have recovered.
Law enforcement officials warned they will begin enforcing rules that residents shelter in place. The report also said there had been no reported ICU admissions for people under 19.
According to CNN, a news release from the Los Angeles Department of Public Health advised doctors not to test patients with mild respiratory symptoms unless "a diagnostic result will change clinical management or inform public health response".
The stay-at-home order is not a license "for everyone to be panic gun-buying or rushing to stores, which is now what we're seeing", Villanueva said.
Nevada governor limits use of anti-malaria drugs for coronavirus patients
Trump has called chloroquine and the closely related hydroxychloroquine potentially important in the fight against Covid-19. Health officials in Nigeria have said three Nigerians have overdosed on chloroquine in attempts to combat COVID-19.