Most Delta Distributors Feel No Symptoms of COVID-19

Researchers from China said that people with the delta strain of SARS-CoV-2 are more likely to spread the virus before

symptoms of the disease. They compared this indicator with people who became infected with early versions of the coronavirus.

“It's just harder to control,” said Benjamin Cowling, an epidemiologist at the University of Hong Kong and co-author of the study.

Cowling and colleagues analyzed the dataanalyzes of 101 patients in Guangdong who contracted the delta strain between May and June 2021, as well as data from close contacts of these people. They found that, on average, people began to experience symptoms 5.8 days after being infected with the new strain - 1.8 days after they first tested for viral RNA. Thus, people had almost two days to transmit the virus before they showed signs of COVID-19.

Unequal vaccine distribution across countries is driving deadly new COVID-19 mutations

According to an earlier study andunpublished analysis, before the onset of the delta, people infected with SARS-CoV-2 took an average of 6.3 days to develop symptoms and 5.5 days to test positive for viral RNA, leaving a narrower time window of 0.8 days for the spread of the virus without a trace.

In the latter work, the researchers alsofound that people infected with the delta strain had a higher concentration of viral particles in the body than people infected with the original version of SARS-CoV-2. “Somehow the virus appears faster and in greater numbers,” the scientists note.

В результате 74% случаев заражения дельтой occurred at the stage before the symptoms - this is more than with the previous strains. This high figure helps explain how this option became dominant around the world.

Read more

Giant iceberg A74 collides with the coast of Antarctica

Two new dinosaur species discovered in China

What is the Kessler effect, and also when and what will the collision of satellites in orbit lead to?