BibTex format
@article{Altmann:2021:10.1016/S2213-2600(21)00458-6,
author = {Altmann, DM and Boyton, RJ},
doi = {10.1016/S2213-2600(21)00458-6},
journal = {The Lancet Respiratory Medicine},
pages = {1356--1358},
title = {Waning immunity to SARS-CoV-2: implications for vaccine booster strategies.},
url = {http://dx.doi.org/10.1016/S2213-2600(21)00458-6},
volume = {9},
year = {2021}
}