(WTVO) — Moderna says those who received two doses of its COVID-19 vaccine will need a third dose before winter.
According to WNBC, the company is also working on a single shot that would act as an annual booster shot for COVID-19, the flu, and the respiratory condition RSV.
The company said it’s booster shot had proven effective against COVID-19 variants, producing “robust” immune response against delta.
“We believe that increased force of infection resulting from Delta, non-pharmaceutical intervention (NPI) fatigue, and seasonal effects (moving indoors) will lead to an increase of breakthrough infections in vaccinated individuals,” the company said in its second-quarter earnings presentation Thursday.
According to the presentation, Moderna’s COVID-19 shot was about 93% effective through six months after the second dose, but antibody levels were expected to wane and impact vaccine efficacy.
“Given this intersection, we believe dose 3 booster will likely be necessary prior to the winter season,” the presentation said.
Cases of COVID-19 have surged in recent weeks due to the prevalence of the delta variant, provoking new masking measures in states across the nation. However, daily death rates remain low compared to last year, presumably due to 50% of the U.S. population having received a vaccine.