One thing to consider is that -70C is quite a rare temperature. There are lots of industrial-sized freezers that go down to the -20/-30 region, there is then a gap in availability until we get to "cryo-storage" which is in the region of -200C where again there are quite a number of "industrial scale" units around.

... giving the same dose twice but giving one "big" dose and one "little" dose (I can't remember the sequence) ...

Actually, it was the other way round - little first, then the big one.

Seems as if the human immune system likes to receive an amuse-bouche before the main course ...

Thanks Richard - certainly an unexpected effect!

In part you are right, industrial and domestic freezer systems do work using the same heat-pump cycle. All heat-pumps are designed to work over temperature range, and it is perfectly possible to design one to work with a temperature differential of the ~100C required to get down to -70C - indeed there are many that are running over much bigger temperature ranges in heating applications, where they are used to get up to over 300C from an ambient of 20C.
The reason for not having many freezer storage units in the range of -70C is quite simple : there's very little advantage in dropping storage temperatures for "normal" products to below about -30C. And why the much lower temperature? its again a case of demand - there are quite a number of things that do need to be stored at those temperatures, but they are generally low volumes and one might just as well use a Dewar type system rather than build a heat-pump.

Meanwhile, at another university:
Volunteering my phone to research Covid-19 while I sleep

All I have to say is my local food shop has a freezer they use to hold dry ice for sale. It isn't big, but it would easily hold a pile of dose vials. Of course lawyers would have a field day because it isn't medical certified.

Of course lawyers would have a field day because it isn't medical certified.

And that's probably the biggest stumbling block.....

The Netherlands will go into total hard lockdown from midnight 15 December 2020 until at least 19 January 2021.
Germany will go into total hard lockdown from midnight 16 December 2020 until at least 10 January 2021.

All non-essential shops are to close. Only supermarkets and pharmacies are to stay open. All schools will close as well.
Hotels stay open, but you can't eat at their restaurants. Restaurants are to deliver at home or take away only.
People are to stay at home as much as possible, work from home where possible. All non-essential travel is not advised.

Welcome to our little part of hell.

Meanwhile in UK.

https://news.sky.com/story/covid-19-pub-offers-pint-called-substantial-meal-to-get-around-tier-2-restrictions-12147948

Get Out Of Dodge...
Dodge City mayor who publicly supported mask mandate resigns after receiving threats

Not sure which rule I'm supposed to have broken now.

Posting large pictures. Please remember not everyone has large screens and some view these pages on a moblie.



This is a much better size and takes seconds to edit in Imgur

Looks like Covid means I am staying at home this Christmas and not seeing my father who will be spending his first Christmas without my mum who died in April in almost 70 years.

Brexit comes early. Belgium joined the Netherlands in banning flights from the UK on Sunday, and also banned rail connections as a new, more infectious strain of coronavirus was spreading rapidly in southeast England.
source.

Reminds me of Doomsday but then for the whole of the UK. Let's build that wall... ;-)