How to estimate the vaccine effectiveness precisely.
Liang
Zheng
Z
Ling
Wang
W
Lei
Shi
S
Jielai
Xia
X
D035843:Biomedical Research / Q000379:methods*; D004812:Epidemiologic Methods; D006801:Humans; D014612:Vaccines / Q000276:immunology*
D014612:Vaccines