

SAN FRANCISCO (KGO) -- A surge in coronavirus cases has been reported in the Bay Area and across California as well as the country due in part to the emergence of the highly-contagious delta variant.
The latest number of confirmed cases in the U.S. can be found at the CDC's 2019 Novel Coronavirus in the U.S. page. (The CDC updates the webpage on Monday, Wednesday and Friday.)
Join anchor Kristen Sze for ABC7's daily, interactive newscast about the coronavirus outbreak in the Bay Area and around the world. You can check here to stream the show Monday-Friday at 3 p.m.
Here are the latest developments on the respiratory illness in the Bay Area:
11a.m.
1st US case of Omicron variant reported in San Francisco
The first case of the Omicron variant in the United States is reported in San Francisco, city health officials said on Wednesday.
The city's health department confirmed that the infected person returned from South Africa on November 22, and is a San Francisco resident.
The patient had mild symptoms.
This is the first known case detected nationwide.
Omicron has been named a "variant of concern" and the CDC has been monitoring for it since before Thanksgiving.
6:05 a.m.
Pfizer requests FDA authorization to expand booster eligibility
Pfizer has officially requested Food and Drug Administration authorization of its COVID-19 booster for 16- and 17-year-olds, the company's CEO said.