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A single dose ofPfizerorModerna'sCovid-19vaccines was 80% effective in preventing coronavirus infections, according to a new Centers for Disease Control and Prevention study of vaccinated health-care workers.The effectiveness of partial immunization was seen two weeks after the first dose, according to the CDC, which looked at nearly 4,000 health care personnel, first responders and frontline workers between Dec. 14 and March 13. The health care workers in the study, which was published Monday,

Zhihu Technology shares opened at $8.02 each on Friday, about 15.6% lower than the company’s IPO pri

KEY POINTS 41% of non-investors say they believe the market is rigged and 56% of investors agree. T

Outlook is brightening, but recovery ‘far from complete,’ Fed chairman says in WSJ op-ed.Federal Reserve Chairman Jerome Powell on Friday said that while the U.S. economic outlook is “brightening,” the recovery is “far from complete.”In an op-ed published in the Wall Street Journal,Powell recounted the moment last February when he realized that the coronavirus pandemic would sweep across the country.“The danger to the U.S. economy was grave. The challenge was to limit the severity and duration o