Yes , some research shows corona is in the air.
You can wear double mask. But it's depends on the which type of mask are you wearing.like N-95 mask doesn't require doubling up. Surgical mask provide good prevention. But sometimes double mask cause breathing difficulty also . So be careful .
Next Steps
Double mask if required should be done with cloth mask because it doesn't provide 100% protection.
Health Tips
yes, you can use alcohol based hand sanitizer and hand wash also. best is social distance.