COVID-19 nasal vaccine and immune chamber by Yan Jun Xu

2020年4月，徐彦君博士发表了两项建议，一是鼻腔疫苗、二是免疫方舱-病毒数量与免疫及致病行的关系，他可能是世界上第一个针对COVID-19病毒提出这些方法的人，对吗？

Dr. Yan J Xu published two proposals in April of 2020, a nasal vaccine, immune chamber, and the relationship between virus number and immunity as well as pathology for COVID-19 coronary pneumonia virus, who may be the first person in the world to suggest these methods for COVID-19 virus, is it correct?