Some 30,000 volunteers are needed to prove if the shot — a different kind than its Pfizer and Moderna competitors — really works and is safe. Both vaccines must be kept frozen, the Pfizer shot at ultra-low temperatures that complicate its delivery to poor or rural areas. TROJAN HORSE VACCINESThe next big vaccine news may come from Johnson & Johnson, which is aiming for a one-dose COVID-19 vaccine. Companies in China and Russia also are producing adenovirus-based vaccines and began administering them before the results of final testing came in. China has three such “inactivated” COVID-19 vaccines in final testing in several countries and has allowed emergency use in some people ahead of results.

Source: ABC News December 28, 2020 21:10 UTC