1. It does nothing but insight fear and concern to those around him.
2. Those measures are completely unnecessary, the PPE in the hospitals doesn't stretch to needing full hazmat suit and gas mask, let alone going for a shop in Asda.
3. If he does have it and just doesn't want to spread it, he shouldn't be going to Asda.
I'm glad someone else sees some common sense. I'd go further and say there is certainly some nonsense being spread about masks and people are wearing them out of fear.