Researchers are developing vaccines that would spray into the nose, to block COVID-19 viruses where they enter.
0:00 Introduction 0:51 What are Nasal Vaccines? 1:25 Covid-19 Nasal Vaccines 1:51 Injectable vs Nasal 2:40 History of Nasal Vaccines 3:04 Challenges of Nasal Vaccines 3:34 Promising Covid-19 Nasal Vaccines 5:10 Nasal Vaccines as Boosters
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