Yesterday on Ask the Experts the Director of Health services made it clear that at this advanced stage of spread, not all infected persons will be able to get a test:

Dr. Marvin Manzanero, Director of Health Services
"So, it clearly articulates that there will be a time when you will not be able to test everybody and you will classify them as probable cases. When systems become overwhelmed, not only in terms of contact tracing, but lab capacity, and it clearly says even in terms of lab test kits…so you might have hundreds of thousands of test kits, but you have to also mirror that with the human resources and the capacity you have at your central medical laboratory. Depending on the intensity of the transmission in a specific location, the number of cases and the laboratory capacity, a subset of suspect, or probable cases can be prioritised for testing. I need this to be very, very clear, because that's exactly the shifting mechanism in terms of testing that we have done in San Pedro."

No More Double Testing To Confirm Viral Shedding

And another change in public expectation has to be made for that second negative test to indicate that an infected person has shed the virus. Manzanero says that's done - according to WHO guidelines:

Dr. Marvin Manzanero, Director of Health Services
"Recall that we were saying before that you need to get two negatives before you can be discharged from isolation, from quarantine, whether you're going to be able to go back to work. That particular recommendation has changed in WHO, so that the recommendation actually mentions that the criteria may change, if you are not able to do testing, two negative tests, then, if you are not going to be able to do that, your lab capacity has been overwhelmed, then the criteria that you can use is for people who are symptomatic, people who had fever, flu-like symptoms, 10 days after the onset of symptoms, provided they have gone three additional days without symptoms, which means no fever and any respiratory symptom, those persons may be able to go back to work. So that means, on average, 13 days after you have started with signs and symptoms is when you would be able to go back to work if you are not able to test as a country with the two negative PCR's. And we checked in the region, and most countries have moved towards that. For asymptomatic cases, 10 days after you test positive for SARS COVID 2, if there is no sign or symptom, you can go back to your routine activities."

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