According to US media reports, American epidemiologists predicted on April 30 that the COVID-19 pneumonia epidemic may continue to spread in the United States for at least 18 months to 2 years until 60%-70% of the population is infected. 根據美國有線電視新聞網報道, Mike, head of the Center for Infectious Disease Research and Policy at the University of Minnesota, 說: “這 …