Pakistan Prime Minister Imran Khan has tested positive for COVID-19 two days after receiving his first vaccine dose, government officials said on Saturday, urging people not to be deterred from getting vaccinated. Pakistan’s vaccination roll-out has been met with widespread vaccine hesitancy, and Khan’s positive test could serve as a setback to the mass inoculation drive in the country of 220 million people, health experts said. Khan, 68, is “self isolating at home,” Health Minister Faisal Sultan, said in a tweet, and a close aide said he had a mild cough and fever. Senior aides stressed that he had likely been infected before he was vaccinated on Thursday. Patient Zero Emerged October 2019 Between 622,800 to 968,800 people in Wuhan had COVID-19 by April 2020, and the first case emerged between mid-October and mid-November 2019, according to two new studies. “6·92 percent of a cross-sectional sample of the population of Wuhan developed antibodies against …