The Delta strain of COVID-19 has been found to more transmissible, but the exact rate is difficult to calculate.
The Delta variant, first identified in India, is currently the dominant strain of COVID-19 in the United Kingdom. WHO has listed the Delta variant as the variant of concern (VOC), as it has been found to have a higher rate of transmission than other strands.
Public Health England's (PHE) latest technical COVID-19 briefing shows that the total confirmed cases of the Delta variant in the United Kingdom stand at 75,953. PHE's research suggested that the Delta variant is associated with an almost 60 percent increased risk of transmission compared to the Alpha variant.
Double doses of the vaccine have been found to increasingly cut the risk of transmitting delta or becoming unwell from the disease.
At a COVID-19 virtual press conference conducted by WHO on June 7, 2021, Dr. Maria Van Kerkhove, Technical Lead on COVID-19, and Dr. Mike Ryan, WHO's Executive Director of Health Emergency Programme stated that the variant is indeed more transmissible than the Alpha variant.
The Delta variant has an increased risk of transmissibility than the Alpha variant. However, the actual rate of transmissibility is unknown. More research on the varients' transmission is being conducted worldwide.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19, including symptoms, prevention, and available treatment, please refer to the World Health Organization or your national healthcare authority.