Re: Corona Virus Shielding.
Originally Posted by
Donkeyman
->
Are you sure of that OGF ??
Donkeyman! 😷😷
All previous vaccines have only provided a defence against a virus, so I can't see why this vaccine for covid will be any different. A vaccine is not a silver bullet donkeyman.
I had the mumps and whooping cough vaccine when I was young... I caught both, but have lived to tell the tale. Perhaps things might have been different if I hadn't had the vaccines...
A vaccine provides the same protection as catching the virus and surviving does, but without the risk.
https://en.wikipedia.org/wiki/Vaccine
A Summary from the above....
Limitations to their effectiveness, nevertheless, exist.[18] Sometimes, protection fails because of vaccine-related failure such as failures in vaccine attenuation, vaccination regimes or administration or host-related failure due to host's immune system simply does not respond adequately or at all. Lack of response commonly results from genetics, immune status, age, health or nutritional status.[19] It also might fail for genetic reasons if the host's immune system includes no strains of B cells that can generate antibodies suited to reacting effectively and binding to the antigens associated with the pathogen.
Even if the host does develop antibodies, protection might not be adequate; immunity might develop too slowly to be effective in time, the antibodies might not disable the pathogen completely, or there might be multiple strains of the pathogen, not all of which are equally susceptible to the immune reaction. However, even a partial, late, or weak immunity, such as a one resulting from cross-immunity to a strain other than the target strain, may mitigate an infection, resulting in a lower mortality rate, lower morbidity, and faster recovery.[citation needed]
Adjuvants commonly are used to boost immune response, particularly for older people (50–75 years and up), whose immune response to a simple vaccine may have weakened.[20]
The efficacy or performance of the vaccine is dependent on a number of factors:
the disease itself (for some diseases vaccination performs better than for others)
the strain of vaccine (some vaccines are specific to, or at least most effective against, particular strains of the disease)[21]
whether the vaccination schedule has been properly observed.
idiosyncratic response to vaccination; some individuals are "non-responders" to certain vaccines, meaning that they do not generate antibodies even after being vaccinated correctly.
assorted factors such as ethnicity, age, or genetic predisposition.
If a vaccinated individual does develop the disease vaccinated against (breakthrough infection), the disease is likely to be less virulent than in unvaccinated victims.[22]
The following are important considerations in the effectiveness of a vaccination program:[23]