Can we pursue a "herd immunity" policy?

To the Editor—The coronavirus disease 2019 (COVID-19) pandemic is worsening—even becoming an uncontrollable situation in many countries. [...]some people believe that it is impossible to completely control this epidemic, so they tend to support “herd immunity,” which allows severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to spread freely through the population.1 However, such an approach will not return things to normal after the difficulties caused by this pandemic. [...]this policy will lead to greater challenges. Not only will the national economy be harmed, more people will be infected and mortality rates will be higher. [...]before specific drugs or effective vaccines are developed, both individuals and countries should firmly pursue the strategies of suppressing and controlling transmission.