- Early evidence suggested vaccine protection against Delta variant: Study
- Delta variant was first identified in India
- The researchers cautioned against using the data to compare the vaccines
London: The Delta coronavirus variant doubles the risk of hospitalisation compared with the previously dominant variant in Britain, but two doses of vaccine still provide strong protection, a Scottish study found on Monday.
The study said early evidence suggested the protection from vaccines against the Delta variant, first identified in India, might be lower than the effectiveness against the Alpha variant, first identified in Kent, southeast England.
British Prime Minister Boris Johnson is expected to delay the ending of COVID-19 restrictions in England on Monday, following a rapid rise in cases of the Delta variant, which is also more transmissible than the Alpha variant.
The study, published in a research letter in the Lancet, looked at 19,543 community cases and 377 hospitalisations among 5.4 million people in Scotland, 7,723 cases and 134 hospitalisations of which were found to have the Delta variant.
Chris Robertson, Professor of Public Health Epidemiology, University of Strathclyde, said that adjusting for age and comorbidities, the Delta variant roughly doubled the risk of hospitalisation, but vaccines still reduced that risk.
If you test positive, then two doses of the vaccine or one dose for 28 days roughly reduces your risk of being admitted to hospital by 70%, he told reporters.
Two weeks after the second dose, Pfizer BioNTech’s vaccine was found to have 79% protection against infection from the Delta variant, compared to 92% against the Alpha variant. For Oxford-AstraZeneca’s vaccine, there was 60% protection against Delta compared with 73% for Alpha.
The researchers cautioned against using the data to compare the vaccines against each other due to differences in the cohorts which received each type of shot, and differences in how quickly immunity is developed with each shot.
They said two doses of vaccine provide much better protection than one dose against the Delta variant, and a delay to easing lockdown in England would help more people get second doses and for their immune responses to build up.
I think any sort of increase in the window of opportunity before lockdown measures are completely brought to an end will be helpful, said Aziz Sheikh, Director of the Usher Institute at the University of Edinburgh.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
NDTV – Dettol Banega Swasth India campaign is an extension of the five-year-old Banega Swachh India initiative helmed by Campaign Ambassador Amitabh Bachchan. It aims to spread awareness about critical health issues facing the country. In wake of the current COVID-19 pandemic, the need for WASH (Water, Sanitation and Hygiene) is reaffirmed as handwashing is one of the ways to prevent Coronavirus infection and other diseases. The campaign highlights the importance of nutrition and healthcare for women and children to prevent maternal and child mortality, fight malnutrition, stunting, wasting, anaemia and disease prevention through vaccines. Importance of programmes like Public Distribution System (PDS), Mid-day Meal Scheme, POSHAN Abhiyan and the role of Aganwadis and ASHA workers are also covered. Only a Swachh or clean India where toilets are used and open defecation free (ODF) status achieved as part of the Swachh Bharat Abhiyan launched by Prime Minister Narendra Modi in 2014, can eradicate diseases like diahorrea and become a Swasth or healthy India. The campaign will continue to cover issues like air pollution, waste management, plastic ban, manual scavenging and sanitation workers and menstrual hygiene.