I wish someone would point this out to the disability "advocates" who have been pimping wearables targeting Long Covid and chronic illness communities for profit, not because they can accurately calculate your baseline from the dermis level
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"the visible app can help you know your baseline and pace yourself"

there are an infinite number of things that can alter a person's baseline that would not show up on a skin wearable

like asymptomatic infections

or really, any and all asymptomatic physiological phenomena, for that matter.....
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