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SW-User
Yes. Most people will have at least mild symptoms, but plenty go under the radar. There's growing evidence of this. Labs around the world are busy developing ways to test for certain antibodies in your blood, which will show whether you had the virus or not. It'll take a while until they are developed, because there is a high margin for error with some methods (for example, antibodies produced to fight a different virus -- like the coronavirus that causes one of the four main types of "common cold" -- could cause a false positive reading, so they have to prevent that from happening).