tickleandrose
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This really depends on the case of that 60 year old lady. For example, does she have a genetic predisposition? Does she have any other risk factors: e.g. smoker, hormone replacement treatment, phx of clotting disorder, cancer, recent long distance travel and surgery, leg injuries, period of immobility etc.
So far we dont have any information on that, probably for privacy reasons.
That said, the atrozeneca vaccine uses a technique of using adenovirus as a carrier to deliver viral information into our cells. The first one of its kind was an experimental vaccine for ebola.
These are of course all tested on animal studies including primates and considered to be safe in human trials. But this is the first time they had been used on population wide basis.
These are also being used by Biotech companies to show off their modern techniques. But because they are new, they suffer from data limitations.
There are of course, vaccines that uses old techniques - which are more crude, but tested, and used widely before, e.g. using inactivated corona virus fragments. These are the basis of the sinovac from China. However, as they are older techniques, these suffers from efficacy problems similar to atrozeneca vaccine.
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