[Secret Agent Man]

not everyone who has it knows they have it

so it becomes a worse problem for them

[palmer]

not everyone who has it knows they have it

Which is a good reason to wear masks. The people who would be negatively affected by masks should not be out in public. One simple way to tell, if you run our of breath trying to talk then you have low oxygen.

[lewislynn]

not everyone who has it knows they have it

so it becomes a worse problem for them

You need to stay indoors.