The U.S. has seen a 135% surge in confirmed cases over the past two weeks, and public health officials are deeply concerned about the outbreak this fall.

Experts are concerned about the expanding outbreak caused by Delta, and are worried about the outbreak in the coming weeks and fall.

Although the U.S. vaccination rate for Wuhan pneumonia (novel coronavirus disease, COVID-19) is among the highest in the world, the number of confirmed cases has skyrocketed again in recent days, jumping 135 percent in the past two weeks in the United States, with the number of confirmed cases climbing in almost every state.

Vivek H. Murthy, director of the U.S. Public Health Service, noted that areas with insufficient vaccinations are at risk and that hospitalizations in these areas have increased significantly, and that more cities are now raising vaccination restrictions. Murthy also said millions of people are still unvaccinated and some are boycotting the vaccine, but more Americans are returning to work and many unvaccinated students are going back to school, and there is still deep concern about the outbreak in the coming weeks and in the fall.

Rochelle Walensky, director of the U.S. Centers for Disease Control and Prevention (CDC), noted that 97 percent of patients hospitalized with the disease in June were not vaccinated. He believes that Wuhan pneumonia is becoming an epidemic among the unvaccinated.