![COVID: study finds lower antibody activity against delta variant at single dose – but vaccines still work COVID: study finds lower antibody activity against delta variant at single dose – but vaccines still work](https://images.theconversation.com/files/411927/original/file-20210719-27-la82si.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=1200&h=1200.0&fit=crop)
COVID: study finds lower antibody activity against delta variant at single dose – but vaccines still work
![Two doses prevent about 95 per cent of COVID-19 hospitalizations: B.C. COVID-19 vaccine effectiveness results Two doses prevent about 95 per cent of COVID-19 hospitalizations: B.C. COVID-19 vaccine effectiveness results](http://www.bccdc.ca/news-stories-site/PublishingImages/about/news-stories/stories/2021/covid-19-vaccine-effectiveness-results/Vaccine%20Effectiveness.png?RenditionID=1)
Two doses prevent about 95 per cent of COVID-19 hospitalizations: B.C. COVID-19 vaccine effectiveness results
![Caffeine as a promotor of sexual development in sterile Queensland fruit fly males | Scientific Reports Caffeine as a promotor of sexual development in sterile Queensland fruit fly males | Scientific Reports](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fs41598-020-71671-x/MediaObjects/41598_2020_71671_Fig1_HTML.png)
Caffeine as a promotor of sexual development in sterile Queensland fruit fly males | Scientific Reports
![UF Health Shands chief epidemiologist says vaccines essential to tamp down COVID-19 delta variant | UF Health, University of Florida Health UF Health Shands chief epidemiologist says vaccines essential to tamp down COVID-19 delta variant | UF Health, University of Florida Health](https://m.ufhealth.org/sites/default/files/media/News/Covid-19%20Fuchs_Iovine_Vaccinations_LB101588.jpg)