Washington, June 29:
People on six continents already are getting jabs in the arm as the race for a COVID-19 vaccine enters a defining summer, with even bigger studies poised to prove if any shot really works — and maybe offer a reality check.
Already British and Chinese researchers are chasing the coronavirus beyond their borders, testing potential vaccines in Brazil and the United Arab Emirates because there are too few new infections at home to get clear answers.
The U.S. is set to open the largest trials — 30,000 people to test a government-created shot starting in July, followed about a month later with another 30,000 expected to test a British one.
If the best COVID-19 vaccine is only 50% effective, “that’s still to me a great vaccine, said Dr. Drew Weissman of the University of Pennsylvania.
Only China is pushing out inactivated vaccines, made by growing the new coronavirus and killing it. Vaccines by Sinovac Biotech and SinoPharm use that old-fashioned technology, which requires high-security labs to produce but is dependable, the way polio shots and some flu vaccines are made.