imagine you have lowgrade symptoms and your exhaling the virus.. you are only exhaling maybe 2% risk to another person
they inhale it with other clean atmospheric air. they only fight 1%(air diluted) of full viral load. = no symptoms and statistically 0 spread to a third person
but the more a person gets in the more symptomatic they will get fighting it. and the more it then multiplies to then spread to more people
so although a teen with no symptoms is technically a 0 spreader
not all teens are going to be 0 spreader
there is still a risk to teens of getting more then a 2% load (minor fever but teen doesnt realise they sick as its minor fever. so thinks they are asymptomatic. but can spread.. it just takes longer to be a viable amount being passed)
there is still a risk some teens get 10% load where they are mild
so turning that mild into a minor/asymptomatic. is technically 0 spreader.. but not factually
a teen sitting 3foot beside a person with a mask not facing each other. for an hour.. no harm
a teen in bed with their BF/GF facing each other no mask for an hour.. yep even a asymptomatic can spread it to their BF/GF and they get mild symptoms
its more about not having teens face to face for an hour non stop that makes them technically non-spreaders. not the fact that they wont spread. but that their lifestyle is its own social distance.
teens dont wanna get caught by parents sneaking their BF/GF overnight. so they just do their romance stuff in 30seconds-1 hour(very lucky BF/GF if they can last 1 hours)
so if it took 1hour of <2foot distance then technically they would be spreaders.
so its luck teens are anti-social and rebellious and cant last 1 hour arm-in-arm with another person. certainly not their teacher/parents
playing games in their bedroom alone with closed door is in many ways better than a facemask
but a facemask is better if your dry humping someone for more than an hour breathing on them
......
they know a 30% mild symptom. is
2foot = 2x air dilution and 15% hit in 2 minutes
= 30% hit in 4 minutes
4foot = 6x air dilution and 10% hit in 4 minutes
= 30% hit in 12 minutes
6foot = 18x air dilution and 3% hit in 4 minutes
= 10% hit in 15 minutes
= 30% hit in 40 minutes
which as you can see the advice even since last year.. 15minutes at 6foot is the limit
as its roughly a 10% risk from someone with 30% mild
thus if you get it you may only get 10%(minorasymptomatic)
so they know 2% minor/asymptomatic is
2 foot = 2x air dilution and 1% in 2 minutes
= 30% in 1hour
4foot*= 6x air dilution and 0.33% in 2 minutes
= 1% in 6 minutes
= 10% in 1 hour
+cloth face covering = 7% in 1 hour
+surgical mask = 2% in 1 hour
+N95 respirator = 1% in 2 hours
* side by side both facing forward not face to face