The vaccines based on the adenovirus and influenza are being developed by the National Center for Genetic Engineering and Biotechnology. By.
https://www.google.com/url?rct=j&sa=t&url=https://thehill.com/changing-america/well-being/prevention-cures/567310-human-trials-for-nasal-spray-coronavirus-vaccine&ct=ga&cd=CAIyGjg0YzkwMzEwZTQwYzQxNjA6Y29tOmVuOlVT&usg=AFQjCNGDwScdqzIIsTZMl0nSLDP4vQRBpA
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