before any vaccine is available
Look at this, https://www.healthline.com/health/home-remedies-for-pneumonia Gargling salt water 3 times a day as a habit even before getting any symptoms is how China has gotten this deadly pandemic under control. They also drinks warm water afterwards. The theory is that this virus attacks your throat first and then down the rest of the respiratory system. By having the salt water exterminate the virus there and by swallowing the leftovers with warm water into the acidic stomach prevents their further development in the body. This is probably something that can be done in general to lower infections in flu season. The problem here is that in China if the government orders their citizens to do something, they will do it, but not so easy for a free country, and another problem is the greed of people. Because these natural disease prevention knowledge cannot make any money, no one will advertise them. To a certain extent, medical workers depend on bad habits of people for their job security. E.g. Less bad posture, less physiotherapy needed, and in general, good habits and more healthy lifestyle, less medical work needed. Perhaps this virus allows people to re-think about what is most valuable in life. Jesus said, 'Those who sin are slaves of sin.' To apply it to our situation, those who enjoy a bad habit are really slaves to that habit. Those who like and practice good habits are truly freed. Jesus said, 'If you keep my word, you are my true disciple, and you will know (experience) the truth and the truth will set you free.' Happy Easter, and blessings!