[contentcards url=”https://www.scmp.com/news/hong-kong/health-environment/article/3099645/coronavirus-first-hongkongers-tested-mass-covid” target=”_blank”] By Lilian Cheng, Gigi Choy, Jack Lau, Laura Westbrook, Kathleen Magramo and Phila Siu Number of people tested climbs as screening gets under way on Tuesday at 141…