^^Source does not have reliable data.
Problem is, too many people believe what they are told and never look into the data and facts... Or check for how the data was collected and the test groups used or the amount of time tested.
It is close to impossible when something is less than a year old. Truth is we still have no real data to prove long term or short term. Everything is an educated guess based on little knowledge and little testing. The only exceptions are what has been tested to kill the bug. Even then there are consequences on how the treatment will affect the person, surface (materials), air quality and equipment.
Real science and studies take time, otherwise we would have the cure for other illnesses already (Hepatitis B, HIV, etc.).
All we can do is practice good hygiene, clean like our grandmothers (bleach, vinigar, ammonia), and practice common curtousy (cover mouth/nose when sneezing or coughing).. Oh, and chew your food with your mouth shut.
This is like walking down a dark cave with no light, you don't know what is at the end until we get there.