New major COVID-19 variants will emerge if people don’t get vaccinated against the coronavirus, experts recently told CNBC. “Until the whole world is vaccinated, not just rich Western countries, I think we are going to remain in danger of new variants coming along and some of those could be more virulent than omicron,” Dr. Andrew Freedman, an academic in infectious diseases at Cardiff University Medical School, told CNBC. Freedman said viruses “tend to become milder” with time, but that “isn’t always the case.” “It may well be with future variants that they are even more contagious, they may be milder,...