Beijing-ALsharqiya, January 28: A team of WHO experts is preparing to start a very sensitive mission related to tracing the origins of the Covid-19 pandemic, after Washington confirmed with an investigation that it would assess the credibility of the investigation report upon its completion, in a warning rejected by China. China has so far repelled international efforts to trace the origin of the virus that has killed more than 2.1 million people in the world, and it was only recently that it allowed the WHO team to enter its territory after a repeated postponement of the visit, and the United States' invitation came at a time when the number of HIV infections exceeded the threshold of 100 million. An infection As governments make strenuous efforts to obtain limited doses of the vaccine, amid a dispute that erupted between the European Union and Britain over supplies of the vaccine produced by AstraZeneca