Could a common nasal spray help block Covid-19? What a new study shows

A common nasal spray may lower the risk of getting Covid-19, a new study shows. Dr. Leana Wen discusses what this all means as coronavirus cases rise.

​ A common nasal spray may lower the risk of getting Covid-19, a new study shows. Dr. Leana Wen discusses what this all means as coronavirus cases rise. Read More Breaking News, Latest News and Videos | CNN