Αποτελέσματα Αναζήτησης
11 Οκτ 2021 · Emerging observational studies do suggest that a single dose vaccine strategy might confer high efficacy against SARS-CoV-2 infection and disease severity 4–8: but these studies have been limited to a restricted age group – mainly older patients – with generally shorter follow-up of 4 weeks.
14 Ιουλ 2021 · For two-dose vaccines, vaccines only give partial protection after the first dose, and the second dose increases that protection. It takes time before protection reaches its maximum level a few weeks after the second dose. For a one-dose vaccine, people will have built maximum immunity against COVID-19 a few weeks after getting vaccinated.
10 Φεβ 2023 · We found that the vaccine effectiveness of the primary vaccine series against SARS-CoV-2 infections begins at an adequate level, as defined by WHO, of 83% at 14–42 days after series completion; however, vaccine effectiveness decreased significantly by 112 days after vaccination, reaching 47% by 280 days after vaccination, well below an ...
12 Ιαν 2022 · For the BNT162b2 two-dose regimen, vaccine effectiveness reached a peak level of 94.5% (95% confidence interval [CI], 94.1 to 94.9) at 2 months after the first dose.
21 Ιουλ 2021 · Effectiveness after one dose of vaccine (BNT162b2 or ChAdOx1 nCoV-19) was notably lower among persons with the delta variant (30.7%; 95% confidence interval [CI], 25.2 to 35.7) than among...
21 Φεβ 2022 · We found that during the 6 months after full vaccination, vaccine efficacy or effectiveness against SARS-CoV-2 infection and symptomatic COVID-19 disease decreased by approximately 20–30 percentage points, on average, for the four vaccines that we evaluated.
19 Μαΐ 2023 · The highest first dose overall effectiveness of the studied vaccines was against the Gamma variant (74% (95% CI, 0.73, 0.75)), and the highest effectiveness after the second dose was observed against the Beta variant (96% (95% CI, 0.96, 0.96)).
