CNET: “On March 13, 2020, US President Donald Trump issued a state of emergency in response to COVID-19, two days after the World Health Organization announced the outbreak could be characterized as a pandemic. At that time, fewer than 2,000 Americans had tested positive for the virus. Today, there have been 79 million cases reported in this country, and more than 965,000 deaths. Advances against SARS-CoV-2, the virus that causes COVID-19, have come relatively rapidly: By the end of 2021, multiple effective vaccines had been approved and Pfizer had received FDA authorization for its COVID antiviral drug Paxlovid, which the pharmaceutical company says could cut the risk of hospitalization or death by up to 89%. Two years on, with a global death toll of more than 6 million people — and tens of millions more infections and hospitalizations — scientists are still struggling to understand major aspects of the disease…”