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In the late seventies I lived and worked in New York. My job took me all around the United States and Canada. So I like to go back occasionally; the last time being a couple of years ago with my soon to be wife Wendy. She had never been to New York so I worked up an itinerary to show her the highlights in just a few days. We also decided to drive to Washington DC and Boston.
On the occasion of an afternoon tea to mark this significant milestone...
| When I was one, I was just begun; When I was two, I was nearly new; When I was Three, I was hardly me; * * * But then I was sixty, and as clever as clever; Wouldn't it be nice to stay sixty for ever and ever? (With apologies to AA Milne) |
Hang on! Now I'm seventy? How did that happen?
As we all now know (unless we've been living under a rock) the only way of defeating a pandemic is to achieve 'herd immunity' for the community at large; while strictly quarantining the most vulnerable.
Herd immunity can be achieved by most people in a community catching a virus and suffering the consequences or by vaccination.
It's over two centuries since Edward Jenner used cowpox to 'vaccinate' (from 'vacca' - Latin for cow) against smallpox. Since then medical science has been developing ways to pre-warn our immune systems of potentially harmful viruses using 'vaccines'.
In the last fifty years herd immunity has successfully been achieved against many viruses using vaccination and the race is on to achieve the same against SARS-CoV-2 (Covid-19).
Developing; manufacturing; and distributing a vaccine is at the leading edge of our scientific capabilities and knowledge and is a highly skilled; technologically advanced; and expensive undertaking. Yet the rewards are potentially great, when the economic and societal consequences of the current pandemic are dire and governments around the world are desperate for a solution.
So elite researchers on every continent have joined the race with 51 vaccines now in clinical trials on humans and at least 75 in preclinical trials on animals.