If Covid-19 vaccines are the superheroes, fighting against the worst effects of coronavirus with a needle and vial, they’re soon set to get a seriously kick-ass sidekick in different guise: the nasal spray.
Teams of scientists around the world are hard at work developing sprays that will not only deliver Covid-19 vaccines into the body – great news for needle phobics – but may also help prevent and treat early infection from the virus.
The nose, you see, is a key entry point for the SARs-CoV-2 virus. It gets in via the droplets produced when someone infected with Covid-19 coughs, sneezes or speaks. Cells inside the nose have more of a certain receptor – the ACE-2 receptor – than other cells in the body, and these are like magnets for the coronavirus, making the nose far more susceptible to the unwanted invader.
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