MANILA, Philippines — President Rodrigo Duterte thanked Russia late Monday night for an offer to supply a COVID-19 vaccine once it becomes available. He said he was very happy that Russia would supply the vaccine "and they are not talking about any payment." Kung hindi puwede sa akin, 'yan ang problema," Duterte said Monday, claiming he would be the first to test the vaccine. According to guidelines on clinical trials set by the US Food and Drug Administration, Phase 1 of clinical trials usually involve 20 to 100 volunteers and last for "several months." Phase 3 clinical trials involve "300 to 3,000 volunteers who have the disease or condition" and can take from a year to four years.

Source: Philippine Star August 10, 2020 16:07 UTC