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two doses needed, 3 weeks apart, immunity after one month from first dose. Slow rollout.
- -80C storage and transport needed. Challenging, but doable in developed countries, but still may slow down mass rollout. Not feasible in many developing countries.
memory B and T cells up to 8 months after recovery from the illness. This means that an immunity of one year is probably likely.
The Pfizer vaccine uses a never-before-approved technology called messenger RNA, or mRNA, to produce an immune response in people who are vaccinated.
"How long this protection lasts is something we don't know," Bourla told CNN.
It's not clear whether the Covid-19 vaccine will become a yearly or season shot, but Bourla believes it's likely. "I think it is a likely scenario that you will need periodical vaccinations," Bourla told Gupta. "The reason why we selected the RNA technology was exactly that. This is a technology that you can boost without problems of creating antibodies against your vaccine, again and again and again."
originally posted by: dug88
a reply to: Willtell
two doses needed, 3 weeks apart, immunity after one month from first dose. Slow rollout.
- -80C storage and transport needed. Challenging, but doable in developed countries, but still may slow down mass rollout. Not feasible in many developing countries.
memory B and T cells up to 8 months after recovery from the illness. This means that an immunity of one year is probably likely.
The world has been waiting for good news on Covid-19 vaccines. Monday it got a bunch of it.
A preliminary analysis of the race frontrunner, Pfizer-BioNTech’s mRNA vaccine, suggested it was 90% effective in preventing symptomatic Covid disease. While these are early findings — the trial is still ongoing — they suggest the vaccine could be very protective.
There’s another important caveat. We don’t yet have details about whether the vaccine blocked mainly mild cases, or if there is evidence that it seemed to prevent some severe infections, too.
We are likely to have multiple successful Covid-19 vaccines.
The Pfizer vaccine targets the spike protein, the knobby protrusion on the SARS-CoV-2 virus that allows the virus to attach to and invade human cells, initiating infection.
In fact, all of the vaccines being developed by major manufacturers working with Operation Warp Speed, the U.S. government effort to fast-track vaccines, target the spike protein...www.statnews.com...
I asked if he thought it was worth it. He said during those 5 hours if you had asked him he would have said no. But by the next afternoon, 24 hours after getting the 2nd shot (when we talked to him) he said absolutely yes.
Interesting Democrats don't want it released until more people have died, oops, until Biden is sworn in as President.
originally posted by: Uphill
a reply to: Willtell Yes, a great deal of news on the COVID-19 vaccine front. On the US cable TV Bloomberg channel, the morning show Bloomberg Markets said the new Pfizer COVID-19 vaccine is having a powerful effect on global markets, mostly to the good, but viewers should also keep in mind that the supply chain for almost all of the new COVID-19 vaccines will be like no other:
That new type of vaccine technology requires storage at super-cold temperatures (100 degrees centigrade). The Bloomberg Markets show anchor then said that "those machines (i.e., the freezers) often break."
Further, and separately from the Bloomberg channel on cable TV, the outbreak of COVID-19 throughout mink farms in Denmark represents a new strain of COVID-19. It remains to be seen whether this new strain of COVID-19 is susceptible to the new COVID-19 vaccines or is totally resistant.
Finally, new reports are emerging on Twitter and elsewhere about more convincing evidence that aerosol spread of COVID-19 is the chief mechanism by which COVID-19 is transmitted. Time will tell. But if so, I'm glad that months ago I began wearing an outlandish-looking getup when my family and I had to venture out to appointments and to make food purchases: A surgical mask topped by a capilene (polyester) neck gaiter, topped with rock-climbing sunglasses that fit flush to the face. When we took my MD son to the airport 2 weeks ago, he teased me that I resemble a Star Wars stormtrooper. I replied, "It reminds me more of the Sand People from the first Star Wars movie in the 1970s." (Laughter.)