@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}, }