Sumary of Why Delta Covid variant is spreading rapidly:
- The team tracked 62 people who were quarantined after exposure to Covid-19 and tested their viral load every day throughout the course of infection to see how it changed over time.
- Researchers then compared participants’ infection patterns with those of 63 people who contracted the original SARS-CoV-2 strain in 2020. The findings, posted preprint, showed that the virus was first detectable in people with the Delta variant four days after exposure.
- The combination of a high number of viruses and a short incubation period makes sense as an explanation for Delta’s heightened transmissibility, Benjamin Cowling, epidemiologist at the University of Hong Kong was quoted as saying to Nature.