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Message: [QUOTE="DocStressor, post: 3755297, member: 10851"] Detection of the virus by PCR can occur after a shorter incubation time than the onset of symptoms (if they occur) and the shedding of infectious quantities of the pathogen. Shedding transmissible quantities of the virus typically occurs between 2 days prior to symptoms and 5 days after symptoms appear. Asymptomatic people, where they have been studied, show a similar infectious period. After 7 days following the onset of symptoms, very few people have been found to be shedding infectious amounts of the virus regardless of whether they go on to get very sick or recover. PCR tests can be positive for a longer period of time, but they are detecting dead virus or debris from infected cells rather than infectious virus. The new quarantine guidelines for people how may have been exposed to an infected person are somewhat disingenuous. They are an attempt to get people who are not willing to isolate themselves for the full 14 day safety period to at least stay away from others for a shorter time. If people quarantine for 7 days and get a negative test on the 7th or 8th day, a small percentage will go on to develop the disease between days 8 and 13. This is a calculated risk assessment that they hope will be more than balanced out by a greater number of infected people accepting quarantine. As far as managing infection among teammates goes, testing after 10 days makes a lot more sense than testing after 7 days. Most teams seem to be using rapid antigen-based tests that provide fast results, which aren't very sensitive. They pretty much only give a positive reaction when infectious amounts of virus are present. PCR could move that up a day, but it typically takes too long to get the results to be of much use. [/QUOTE]

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