How to prevent and treat flu / Covid?

Hello, please share this health tip as I found it's very helpful to me and others. 

1. Place a small amount of Tiger Balm or medicine oil with menthol/camphor ingredient in your palm.

2. Rub both palms anagist each other to heat up the balm/oil.

3. Put your palms in a cup shape and cover over your nose, then inhale a deep breath.

4. Try hold the breath for few seconds. 

5. Exhale with mouth closed.

6. Repeat the treatment method 3 times a  day for preventing. If you are infected, ill, please do this method  every 2 hours and spread the oil on forehead, throat and chest.