I'm not qualified to assess the risk, but if the there's indeed ADE (antibody dependent enhancement),[1][2] people once infected with a milder strain may suffer from more severe symptom from the deadlier strains, thus killing more people in the end.
I'm wondering how we may rule out this worst case scenario.
I'm wondering how we may rule out this worst case scenario.
[1] Is COVID-19 receiving ADE from other coronaviruses? https://www.sciencedirect.com/science/article/pii/S128645792...
[2] New blood tests for antibodies could show true scale of coronavirus pandemic https://www.sciencemag.org/news/2020/03/new-blood-tests-anti...