(ALERT: Visit the WHO for accurate information about the coronavirus pandemic)
The World Health Organization published a study regarding the SARS COVID-19 strain and concluded that "Heat at 56°C kills the SARS coronavirus at around 10000 units per 15 min (quick reduction)." This is definitive proof of the fact that concentrated heat, including that contained within a single hand dryer, can potentially kill COVID-19 germs, so a good precaution would be to spend a longer amount of time placing one's hands underneath a dryer when leaving a public bathroom.
The idea that hand dryers will kill or even remotely protect someone from COVID-19 is completely false. According to the World Health Organization, hand dryers will not protect against COVID-19 and the most effective way to protect against the disease is to wash your hands thoroughly with soap. Yes, intense heat has been proven to at least stem the growth of the virus itself, the amount of heat required to do so is not contained within the capacity of a single hand dryer. This conspiracy theory is neither scientifically backed nor proven.
[P1] The World Health Organization has published a study concluding that a certain amount of heat can kill COVID-19. [P2] The amount of heat required to kill COVID-19 can be contained within the power of a hand dryer. [P3] Therefore, hand dryers can kill COVID-19.
Rejecting the premises
[Rejecting P2] There is no scientific evidence to suggest that a hand dryer contains the amount of heat required to kill COVID-19. [Rejecting P3] Hand dryers cannot kill COVID-19.