Comparação de eficácia das vacinas da Covid-19?
February 3, 2021 - Uma única dose da vacina da Oxford-AstraZeneca contra o coronavírus é 76 por cento eficaz a partir de três a 12 semanas após a injeção, segundo os dados de um ensaio. A eficácia aumentou para 82,4 por cento depois de uma segunda dose após 12 semanas.
The results of the University of Oxford study, which has not yet been formally published, also suggest that the vaccine may have a “substantial” effect on transmission of the virus, the BBC said.
It means the jab could have a greater impact on the pandemic, as each person who is vaccinated will indirectly protect other people too.
The study found the Oxford-AstraZeneca vaccine offered 76% effective protection from a single dose for three months.
With no fall in protection during the three-month period, the researchers said the results supported gaps between first and second doses of between four and 12 weeks. The effectiveness of the vaccine increased with a longer gap of 12 weeks before the booster jab.
When the second dose is given, the study found the level of protection from the Oxford-AstraZeneca vaccine rises to 82%, the BBC said.