[watchfirst9]

Vaccine jab can last for 6 months....

Referring to antibody or T cell?
According to TS article, antibody in the blood wane fast

And jab protection does not cover some areas. 

https://newatlas.com/health-wellbeing/ya...ronavirus/

And most significantly, these nasal and lung IgA responses were not seen in the animals receiving the vaccine by injection. Only intranasal vaccine administration generated this kind of immune response.

We should hope more efficient and safer methods coming soon.