by Patrick GALEY PARIS, France (AFP) — The AstraZeneca/Oxford Covid-19 vaccine appears to be more than 80 percent effective at preventing severe illness among elderly, at-risk individuals after a single dose, according to preliminary research published Wednesday. The results, which have yet to be peer-reviewed, added to the growing body of evidence that the vaccine — which several countries have advised against giving to over-65s — is both safe and effective in older people. Researchers […]