Does S.C.U.B.A. gear work against the Covid19?

Only if the tanks were loaded in a COVID-19 free area.

Have you seen movies like Outbreak or Andromeda strain where they wear “space suits” to work with deadly viruses?

Get out your credit card!

Honeywell Industrial Safety Products – “Ventilated and reusable pressurised protective suit for being used in Bio Safety Level 4 (deathly viruses) laboratories worldwide. Designed for multiple use in BSL4 laboratory.”

I worked on a sealed, positive pressure, escape hood that stowed in a suit coat pocket. It was also flame resistant. However, it was only good for a total time of 30 minutes – the duration of the mission.

The mask would protect your eyes and nose but not your mouth.

@kritiper Good point re. SCUBA masks.. Our escape hood covered the entire head and sealed around the neck with a rubber collar. It was quite confining and frightening if you are claustrophobic even though you could see >270 degrees through the orange film.
It was expensive and single use.