A booster dose of the vaccine against COVID-19 continues to offer older people robust protection against hospitalization nearly four months after receiving the third dose, new data from Britain’s Health Security Agency showed on Thursday.
The vaccine’s effectiveness against hospitalization in people over the age of 65 was 85% 15 weeks after a booster dose, compared with 91% two weeks after receiving the third dose, according to the agency’s latest vaccine surveillance report.
The data is the first to be released by the UK on booster durability. Britain is giving fourth doses to vulnerable age groups and joins a host of other countries including Israel as the world battles the more contagious Omicron variant of the coronavirus.
The fourth dose will be administered six months after the third dose, and a larger campaign is being considered for the fall.
The report attempts to distinguish between people who have been hospitalized for COVID and those who have been hospitalized with an illness and have tested positive during routine check-ups.
The numbers come from his calculations in relation to people hospitalized primarily for respiratory problems, suggesting their admissions are more likely to be COVID-related.
In people aged 18 to 64, the vaccine’s effectiveness against hospitalization appears to have fallen more sharply – to 67% at 15 weeks compared to 88% two weeks after the dose.
However, the UKHSA said this is likely because younger people are more likely to be in hospital for a different reason and also have COVID, which skews the figures to make the vaccines appear less effective.
However, the report reiterated that protection against symptomatic disease declines much more dramatically for all groups: from around 60-75% efficacy two to four weeks after a booster dose to between 25-40% at 15 weeks.
The UK has mainly administered vaccines developed by BioNTech-Pfizer, Moderna and AstraZeneca. The booster program, launched in September, used Pfizer and Moderna’s injections.
COVID booster offers protection for over 65s at 15 weeks – data from UK – SABC News
Source link COVID booster offers protection for over 65s at 15 weeks – data from UK – SABC News