Health - 1540 WADK Newport
SONGPHOL THESAKIT/Getty Images(NEW YORK) -- Monday marks four years since the World Health Organization (WHO) declared the COVID-19 outbreak a pandemic.Since the first cases in Wuhan, China, in 2019, there have been millions of infections and deaths around the world.There have also been major successes including vaccines for nearly all age groups, the development of antiviral drugs to treat those at risk of severe illness and the proliferation of at-home tests.ABC News takes a look back at the some of the most important moments over the last four-plus years:Dec. 31, 2019The World Health Organi...