@article{Rio2021,
author = {Rio, C. and Omer, S.B. and Malani, P.N.},
title= {Winter of Omicron—The evolving COVID-19 pandemic},
year = {2021},
doi = {10.1001/jama.2021.24315},
volume = {327},
number = {4},
pages = {319--320},
}