TY  - GEN
AU  - Sack,David A
TI  - Enhancing immune responses to oral vaccines: still an enigma
SN  - 1474-4457
PY  - 2020///0518
KW  - Administration, Oral
KW  - Vaccines
N1  - Publication Type: Journal Article; Comment
UR  - https://doi.org/10.1016/S1473-3099(18)30662-5
ER  -