AstraZeneca Plc’s vaccine, once expected to be a mainstay of protection for much of the world, remains shrouded in controversy as more countries limit its use. The company said a review shows no evidence of an increased risk of pulmonary embolism or blood clotting. New coronavirus cases rose worldwide for a third straight week, even as the death toll from Covid-19 continues a steady drop. The U.S. is reporting fewer infections, but countries from India to Italy are seeing a resurgence, and hot spots are emerging in places like Papua New Guinea that had seemingly escaped the pandemic last year. Austria’s health minister said he’s observing “the start of a third wave” in the country. Hong Kong will expand the scope of priority groups for vaccination to those age 30-59 starting Tuesday. A vaccine success story unfolds in an unlikely corner of the U.S. CEOs become vaccine activists as […]