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ALBANY, NY (NEWS10) – Data revealed in studies conducted by the Center for Disease Control and Prevention (CDC) shows that after being vaccinated against COVID-19, protection against the virus may decrease – decreasing over time – making it less effective at protecting against Delta variants.
Although COVID-19 vaccination in adults aged 65 and older remains effective in preventing serious illness, CDC says recent data provides transparency on the impact of additional factors that suggest vaccination is less effective to prevent infection or milder disease with symptoms in some populations.
Data shows from a small clinical trial that a Pfizer-BioNTech booster increased the immune response in participants who had their primary series 6 months earlier, according to the CDC, with an increased immune response in protection against COVID-19, including the Delta variant.
However, only certain populations initially vaccinated with the Pfizer-BioNTech vaccine can currently be boosted, the CDC said, with increased benefits in the immune response.
Seniors and people aged 50 to 64 with medical conditions
- People 65 years of age and older and adults 50 to 64 years of age with underlying health conditions should receive a booster shot of Pfizer-BioNTech vaccine. The risk of serious illness from COVID-19 increases with age and may also increase for adults of any age with underlying health conditions.
Long-term care residents aged 18 and over
- Residents 18 years of age and older in long-term care facilities should receive a booster shot of Pfizer-BioNTech vaccine. Since residents of long-term care facilities live closely together in group facilities and are often elderly people with underlying health conditions, they are at increased risk of infection and serious illness from the disease. COVID-19.
People with health problems aged 18 to 49
- Adults aged 18 to 49 with underlying health conditions may be given a booster shot of Pfizer-BioNTech vaccine based on their individual benefits and risks.
- Adults between the ages of 18 and 49 who have underlying health conditions are at increased risk for serious illness from COVID-19. However, this risk is probably not as high as it would be for adults 50 and older who have underlying health conditions.
Employees and residents at increased risk of exposure and transmission to COVID-19
- Adults aged 18 to 64 who are at increased risk of exposure and transmission to COVID-19 due to their work or institutional environment may receive a booster injection of Pfizer-BioNTech vaccine based on their individual benefits and risks.
- Adults between the ages of 18 and 64 who work or reside in certain settings (for example, healthcare, schools, correctional facilities, homeless shelters) may be at increased risk of exposure to COVID- 19.
People aged 18 to 64 who are at increased risk of exposure and transmission to COVID-19 due to their work or institutional environment may receive a booster injection after considering their individual risks and benefits.
These recommendations may change in the future as more data becomes available.
The CDC says additional populations may be recommended to receive a booster injection as more data becomes available, with experts researching any available data to understand how well vaccines respond for different populations. This includes examining how new variants, like Delta, affect the effectiveness of the vaccine.
Find a COVID-19 vaccine: Search vaccines.gov, text your zip code to 438829, or call 1-800-232-0233 to find locations near you.
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