Hundreds of scientists signed a letter addressing US President Biden, European Commission and European Council Presidents, Japan PM Suga and South Korean Presdient Moon.
A man found that he has COVID-19 after he went to Mission Hospital in Mission Viejo for an unrelated health issue, a few weeks after getting the second shot.
Reports alleged that US scientist Peter Daszak, one of the members of WHO's COVID-19 investigation team, was funded by China and worked at the Controversial Wuhan lab for years.
The WHO's team of experts said that the COVID-19 outbreak almost certainly did not start in a Chinese lab but its path from animals to humans needs further investigation.