to keep The infection rate as low as possible – that is the motto in the fight against Corona, as long as there is still no vaccine and no medication against the Virus. Due to the slower diffusion is to be prevented, that health systems and hospitals will be overloaded and collapse, as it was in countries such as Italy, Spain and the US.
a Positive PCR Test says nothing about the infectivity of the Diseased from
An important criterion for the discharge of patients from the quarantine or Isolation is in many Asian countries, a negative PCR Test at this swabs are taken of the nose and throat, and viral RNA tested.
But now, researchers at the National center for infectious diseases and the Academy of medicine in Singapore have found that Covid-19-patients in spite of positive test results from a certain date no longer infectious. To do this, as well as studies from Taiwan, Hong Kong and other countries compared, and analyzed.
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as a result, Covid-19-fell Ill two days before the onset of symptoms contagious – and, up to a maximum of ten days thereafter. They found that the Virus reproduction drops off after the first week, quickly, so that after the second week, despite positive Test results, no viable Virus could be found.
highlight the risk of Contamination is 0.7 days after onset of symptoms
This Thesis is a study from Hong Kong of 77 Infected-pairs, i.e., one Infected and one Person he has attached to supported. This showed that at a mean incubation period of 5.2 days began, the risk of Infection 2.3 days before the onset of symptoms and their peak 0.7 days afterwards reached. After that, you took off within seven days.
- read: What we know and what non – antibody, T-cells, cross-reactivity: The big Corona-immunity-puzzle
In a study from Taiwan you could find 22 Infected and the infected people, the transmission of infection from one Person to the next happened within five days after the onset of symptoms and no later than the.
In 95 percent of the cases showed it will take up to a month to Test negative
micro biological data of 766 Covid-19-patient from Singapore, in turn, on the 15th. Day after the Occurrence of the disease symptoms, only 30 percent have a negative PCR Test. 21. Day, the proportion rises to 68 percent and from 28. Day to 88 percent. Only 33 days after the disease 95 percent of the Tests were negative.
More of the Coronavirus
detected In five percent of the test group, then, could the Virus for up to a month. This does not mean, however, that these patients were still contagious. Therefore, the researchers concluded that the PCR Test does not show even viral components, but these are infectious.
virus excretion in the first disease of the week, the highest
The test evaluations of 73 Covid showed-19-patients in a local study in Singapore. Just when the viral load in the later course of the disease was low, could be isolated in spite of a positive result, no living, and thus infectious Virus, and is cultivated – from the 11. Day of the disease.
This is also confirmed by results of German studies, the were able to prove that the virus excretion in the first week of the disease is very high. The cough expectoration it took between 10. and 11. Day, and in revenge, she was a swab in accordance with the 5. Day no longer detectable. In samples of cervical and lung were able to after the 8. Day no infectious viruses are detected, even though the PCR Test showed a high viral load. All the important messages to the Coronavirus in the FOCUS Online Newsletter. Subscribe now.
Singapore now wants to evaluate on the basis of these studies, whether Covid-19-Ill may be released early from isolation wards, and this could be exonerated, depending on the course and well-being of the patient. In Singapore, the number of Infected, according to Johns Hopkins University and currently 31.960 – have died so far, only 23 people.
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