To PCR or not? The impact of shifting policy from PCR to rapid antigen tests to diagnose COVID-19 during the omicron epidemic: a nationwide surveillance study oleh Hsin Chi, Hsin Chi, Nan-Chang Chiu, Nan-Chang Chiu, Chung-Chu Chen, Chung-Chu Chen, Shun-Long Weng, Shun-Long Weng, Chi-Hone Lien, Chi-Hone Lien, Chao-Hsu Lin, Chao-Hsu Lin, Chao-Hsu Lin, Yao-Feng Hu, Wei-Te Lei, Wei-Te Lei, Yu-Lin Tai, Yu-Lin Tai, Liang-Yen Lin, Lawrence Yu-Min Liu, Lawrence Yu-Min Liu, Chien-Yu Lin, Chien-Yu Lin, Chien-Yu Lin