Since a new coronavirus launched the global pandemic that has now killed more than 6.5 million people - 16 percent of them in the United States alone - scientists in record numbers have devoted themselves full time to unraveling its mysteries.
In less than three years, researchers have published more than 200,000 studies about the virus and covid-19. That is four times the number of scientific papers written on influenza in the past century and more than 10 times the number written on measles.