Yes they work! Intranasal vaccines are how we end Covid. Intramuscular vaccines are mostly effective at preventing Covid from becoming lower respiratory but the

Yes they work! Intranasal vaccines are how we end Covid. Intramuscular vaccines are mostly effective at preventing Covid from becoming lower respiratory but the proteins can still replicate in your nasal passage and upper respiratory system. But intranasally vaccination you can mostly prevent replication in your nasal passage and thereby prevent spreading upper respiratory viruses. They are more effective and essential to stopping Covid spread, we should have done them sooner but they're more expensive to make and ship and last a bit shorter shelf life wise.