The mRNA vaccines needs -70C storage, so a two stage freezer operating in an airconditioned room. In transport, normal refrigerated transport isn't enough and should be packed with dry ice. This basically requires any distribution point to have dry ice facilities. Can work in the US or Europe, but beyond that is going to be challenging.
After the elation of the first approval of a COVID-19 vaccine comes the realisation that making and testing the vaccine is only the beginning. The next job is figuring out how to distribute hundreds of millions of doses across the world.
www.abc.net.au
One of the two leading vaccine candidates requires deep, deep freezing. Here's how communities are working to solve for this and how the new Moderna vaccine could help.
www.npr.org
The pfizer vaccine has come under criticism due to its instability.
The monderna vaccine only requires -20c, its based around a more stable molecule even though its also a mRNA vaccine. -20 is far more doable, and single stage freezers will generally handle that, as will portable cold boxes. It shows that not all mRNA are so delicate.
There are two new COVID-19 vaccines that appear to be more than 90% effective. But what are these vaccines, and how are they different from those used previously?
theconversation.com
I don't think you can call a vaccine made by modifying an existing virus from another species to make it harmless & then adding new DNA to it to stimulate the immune system to recognise another virus "traditional". That's what the Oxford-AstraZeneca vaccine is.
Traditional in the sense of growing vaccines in eggs. mRNA developed from cellular synthesis is a whole different ball game. I don't want to understate what Oxford-AstraZeneca did, what they did is amazing, particularly in the time they had. But its like Michael Angelo doing art with Crayola crayons.
Can the latest techniques speed up the dangerously slow production of flu vaccines?
www.nature.com
mRNA is just more nimble, you will develop a vaccine faster because you don't have to optimize the egg growing virus production and you will have greater flexibility and not be bottlenecked by egg production. (also think about the vulnerability with bird flu - kill chickens - chickens lay eggs - no eggs - no vaccine).
Rather than stock piling pre made egg based vaccines, cellular can respond and produce to threats much faster.
The US had this problem with their Swine flu vaccine, which was soon out of date and provided no protection against later variants, so they had to start stockpiling for the new variant as well as the old one. This soon becomes unmanageable, because viruses keep changing.
Which is why the Australian government has just announced a $1.2B CSL facility near the airport in Melbourne. We need this capability, the game has moved on and we need to keep up with it.
UK has just stopped travel from South America, due to concerns about a new strain coming from there.
Scientists fear mutations are triggering rapid increase in cases where infections were already very high
www.independent.co.uk