, August 2nd. According to the US Chinese website, at least 233 employees from two hospitals in San Francisco have tested positive for the new crown. Most of them have been vaccinated against the new crown but are still infected with the delta variant virus.

  On July 31, local time, Luke John Day, chief medical officer of Zuckerberg San Francisco General Hospital, said that more than 50 cases were found among the staff of the hospital.

Approximately 75% to 80% of people who test positive have been vaccinated.

On May 3, local time, readers borrowed books at the San Francisco Public Library Main Library, California, USA.

Photo by China News Agency reporter Liu Guanguan

  In addition, the University of California San Francisco Medical Center said that as of July 30, 183 staff had tested positive for the new crown, and 153 of them had been vaccinated.

  According to reports, most people are infected with the highly contagious Delta variant virus, which has become the main strain of the new coronavirus in the United States.

  It was also reported that two infected staff members at the University of California San Francisco Medical Center required hospitalization.

  And Luke John Day said that people who test positive at San Francisco General Hospital do not need to be hospitalized. Most infections cause mild to moderate symptoms, and asymptomatic cases have been found through contact tracing.

If the staff do not get vaccinated, the situation will be worse.

  "We are now worried about the surge in cases in San Francisco and the Bay Area," Luke John Day said. "But what we are seeing is largely what the vaccine research data shows us: You may still be infected with the new coronavirus. But if you are infected, the condition is not serious at all."

  According to reports, the city of San Francisco requires employees in high-risk workplaces such as hospitals to be vaccinated against the new crown before September 15.

  With the emergence of concentrated infections in San Francisco hospitals, people's concerns about the Delta variants are increasing, especially as the vaccination rate in the United States has stabilized.

  In the United States, breakthrough cases or infections found in fully vaccinated individuals are still rare.

According to data collected by the National Broadcasting Corporation (NBC), more than 164.2 million people in the United States have been fully vaccinated, and more than 125,000 breakthrough cases have been reported in 38 states.