TY  - GEN
AU  - Mühlemann,K
AU  - Weiss,N S
TI  - Can herd immunity influence the assessment of vaccine efficacy in nonrandomized studies?
SN  - 0090-0036
PY  - 1997///0314
KW  - Bias
KW  - Cluster Analysis
KW  - Humans
KW  - Immunity, Active
KW  - Infections
KW  - epidemiology
KW  - Reproducibility of Results
KW  - Research Design
KW  - Vaccines
KW  - immunology
N1  - Publication Type: Letter
UR  - https://doi.org/10.2105/ajph.87.1.113
ER  -