30 1 20 BUTTON 19 2 17 V_c 15 R_0 12 E 11 3 10 0 6 v2 4 100 4 1940 4 60 4 ef5c 4 gt 4 source 4 svg 3 186596 3 6 3 83 3 __________________________________________________________________ 3 com 3 jpg 2 11 2 15 2 16 2 2011 2 2019 2 229 2 25 2 28 2 5 2 507 2 545 2 67530161 2 7 2 70 2 9 2 924 2 Fine 2 Herd 2 Immunity 2 al 2 et 2 https 2 newpneumonia 2 of 2 png 2 www 1 027 1 04 1 046 1 077 1 101 1 10e18ff65a640175 1 119 1 12 1 12753 1 18 1 19 1 2020 1 24 1 3053 1 3085 1 3204 1 36 1 377 1 4 1 41e9 1 479 1 507299 1 54289 1 570 1 59 1 67 1 69 1 8 1 826 1 91274 1 9a9 1 A 1 B 1 COVID 1 Characteristics 1 China 1 Coronavirus 1 Critical 1 Diseases 1 Epidemiological 1 Novel 1 Outbreak 1 Surveillances 1 The 1 Vital 1 WHO 1 ____________________ 1 act 1 ad058b4b5dfd2867_1440w 1 ae62a1e0263045785 1 an 1 api 1 article 1 b 1 baidu 1 bca9ad1020_hd 1 bcf5a4d0600_1440w 1 c5c41 1 c6c4 1 c9332c30949eb12 1 chinacdc 1 cn 1 csv 1 da7d9e4b6a7ddba 1 df629276ec2abbf16c89e487 1 e53946e2 1 e583c19c3847db41e256b8b130f89_hd 1 effect 1 en 1 fadb1dc70995e3556_hd 1 fdfb964c_hd 1 fea8db1a8f51 1 from 1 gif 1 herd 1 http 1 id 1 indirect 1 level 1 mp 1 net 1 o 1 populationpyramid 1 pp 1 protection 1 qq 1 sari_pc_3 1 true 1 vaccination 1 voice 1 weekly 1 weixin 1 zhihu