What is the specific medicine of COVID-19 nasal spray? Who can give a lecture on popular science?

Nasal spray, COVID-19 specific medicine, COVID-19 specific medicine. Compared with oral drugs, nasal spray is a friendly way of administration, which can inhibit virus infection at the early stage of virus invasion without being directly sprayed into the nasal cavity through metabolism in vivo. The above information comes from the news of Shengnuo biological nasal spray, which can be searched by Baidu.