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A booth displaying a coronavirus vaccine candidate from Sinovac Biotech Ltd is seen at the 2020 China International Fair for Trade in Services (CIFTIS), following the Covid-19 outbreak, in Beijing, China September 5, 2020. Photo:Reuters

Moderna Covid-19 vaccine appears safe, shows signs of working in older adults

The findings are reassuring because immunity tends to weaken with age

Fast growing old people bring new economic challenge

Fast growing old people bring new economic challenge

Neolithic pottery was previously found near crannogs in the Western Isles

Scotland's crannogs are older than Stonehenge