Going so far to the back of the nose puts you in contact with a bone separating the nose from the brain, the Cribriform Plate which is very delicate, thin and has porous holes that lets minute matter pass between the nose and the brain.
They can implant nanoparticles, microchips or anything they want right there and have close access to the brain. Also you raise the risk of infection and punching a hole right into the brain with the swab.
Two new studies found that saliva tests were about as reliable as those that require a sample from the back of the nose. https://www.scmp.com/news/world/article/3099700/goodbye-nasal-swabs-saliva-tests-can-detect-coronavirus-infection
Going so far to the back of the nose puts you in contact with a bone separating the nose from the brain, the Cribriform Plate which is very delicate, thin and has porous holes that lets minute matter pass between the nose and the brain.
They can implant nanoparticles, microchips or anything they want right there and have close access to the brain. Also you raise the risk of infection and punching a hole right into the brain with the swab.