Sample collection for Covid-19 tests is relatively easy and takes less than 15 seconds. But that experience may leave a lasting memory. Currently, it involves the use of a six-inch (half of the average school ruler) long swab, which is inserted into the nose and rotated several times. Rodney Adam, Professor of infectious diseases and microbiology at the Aga Khan University Hospital in Nairobi, prefers the nasal swabs. He says that saliva tests were not a different test but it is the collection of the specimen that is different and the nasopharyngeal swab was more accurate because of the concentration of the virus.