Students seen spitting at Israel’s Technion Institute are not protesting. Technion scientists have developed NaorCov19 – a saliva self-test that can verify Covid-19 infections in just one minute. It can help prevent outbreaks in student dorms and allow the University to reopen when the lockdown ends.
https://www.timesofisrael.com/technion-rolls-out-home-made-coronavirus-spit-tests-on-campus/