When you wear a surgical mask even if it's properly fitted it won’t protect you from the viruses, the filter of that mask is large enough for the virus to pass through.
Reynold Librando
Face mask can create a false sense of security in a real-world scenario and there is no guarantee that You will be protected from it.
Some Practical ways
Regular hand washing is one of the most effective way to prevent the spread of this virus, it is the universal precaution.
Recommended Type of Mask
When you are in a public area, use N95 “air particulate filter mask” it filters 95% of the viruses. it is much more effective to use than any improvise mask that people are using today.
Things to do against COVID-19
Avoid touching your face with your hands unwashed Avoid crowded places and most of all STAY @ HOME