Delta 8 times less sensitive to vaccine antibodies Study among hospital staff, including those from Sir Ganga Ram, says inoculated people should not lower their guard Share Via Email | A+A A- The new study says severe disease in fully vaccinated HCWs is rare but breakthrough infection is a concern and Covid-control measures need to continue By Express News Service NEW DELHI: The Delta variant of novel coronavirus is eight times less sensitive to antibodies generated by vaccines as compared to the original strain that came from China’s Wuhan, according to a new study.The study, which was conducted on more than 100 healthcare workers (HCWs) at three centres in India including Sir Ganga Ram Hospital (SGRH), found that the B.1.617.2 Delta variant not only dominates vaccine-breakthrough infections with higher respiratory viral loads compared to non-Delta infections but also generates greater transmission among the fully vaccinated HCWs. The collaborative study, “Sars-Cov-2 B.1.617.2 Delta Variant Emergence and Vaccine Breakthrough: Collaborative Study”, from India with scientists from Cambridge Institute of Therapeutic Immunology and Infectious Disease is yet to be peer-reviewed.