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Researchers in the United States conducted a study showing that the Corona virus vaccine from Moderna provides strong protection against the variant B.1.617.2 (Delta) in an experiment on rhesus macaques.
The delta variant, which was discovered in India in October 2020, is currently the dominant strain globally, and has been associated with increased transmissibility and increased severity of the coronavirus.
Moderna Vaccine
According to the study published on news-medical A team — from the National Institute of Allergy and Infectious Diseases in Bethesda, Emory University School of Medicine in Atlanta, Bioqual Corporation in Rockville, and Moderna Corporation in Cambridge — reported immunizing rhesus macaques with two doses of Moderna vaccine and then exposing them to the delta variant 48 weeks later.
The team observed that neutralizing antibodies in the animals’ blood and lower airways decreased during the 48-week period after vaccination, and after 4 days of exposure to the delta variant, vaccine-mediated protection in the lungs was strong, likely dependent on antibody responses, the team says.
The results suggest that rapid and sustained protection against delta in the upper and lower airways may eventually require a booster vaccine.Pfizer AndModern Significant protection is shown against the early vaccine-matched strain.
