The one you mention is a viral vector vaccine; the mentioned spray sounds more similar to this (incidentally developed by someone from the same lab): https://ww

The one you mention is a viral vector vaccine; the mentioned spray sounds more similar to this (incidentally developed by someone from the same lab): https://www.helsinki.fi/en/news/pandemics/biological-mask-administered-nasal-spray-can-protect-against-coronavirus-infection-hours https://www.helsinki.fi/en/news/pandemics/biological-mask-ad...