@article{Fan2021,
author = {Fan, G. and Yang, Z. and Lin, Q. and Zhao, S. and Yang, L. and He, D.},
title= {Decreased case fatality rate of COVID‐19 in the second wave: A study in 53 countries or regions},
year = {2021},
doi = {10.1111/tbed.13819},
volume = {68},
number = {2},
pages = {213--215},
}