Originally Posted By: Russ
During the early days (February?) of the pandemic I heard that one simple test was to take a deep breath and hold it for 10 seconds. That alone would supposedly trigger a reaction if your lungs were compromised. Is that “test” still valid or has it been invalidated?


Medical authorities have debunked that one as not having any basis in fact. Some folks with COVID-19 can do that fairly easily especially in the early stages and some folks with unrelated issue often can't do it at all.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman