Be it covid-19 novel corona virus or any other virus on the planet they are not at all dangerous when outside our cells. They get full power only after it enters our cells. When they are outside cells they are almost like a non-living thing. So at that time it is very easy to tackle but once it reach inside cells then it starts to multiply exponentially and take control of our body. In that stage it is difficult to manage. So best option is to not allow them to enter our cells.
So what we can do to avoid virus entering our cells. Main things are stay at home, social distancing, washing hands regularly etc. Follow what government and health authorities says and obey their rules like keep at least 1 meter distance from people, take medical care when there is any symptoms, wear mask when going out etc
Another important thing which most people are not talking about is taking steam. Once covid-19 or any virus enters our body it stick to our lungs or throat for 1-2 days. Then only it enters our cells. So during that time if you take steam that will kill the virus. So it is better to take steam at least once a day or after coming back from outside.
Also boost immune system by taking healthy foods and avoid junk foods. Take ginger, garlic, turmeric, onion, lemon etc daily. Eat foods that make blood alkaline.
Since there is no medicine or vaccine for Covid-19 as of now it is difficult to treat once it takes control of our body. So it is better to prevent it entering the cells.