why is making vaccine for covid19 taking so long?
I recently watched movie outbreak and korean movie flu. In both movies, toward to end, one monkey with antibody (in outbreak) and one person with antibody (in flu) solved the whole problem so quickly and so easily, it seems. That made me wonder, I know they are just movies and I'm not epidemiologist. But, why is making vaccine for covid19 taking so long and why does it seem so difficult to make it? Why can't they just gather antibody from peoples who recovered on their own( there seem to be so many of them) and study it and develop vaccine?
I don't think they can make vaccine within a day or wk like in movies. But, it has been over 6 months already and still no vaccine? Or making vaccine was easy and there are proposed vaccines out there but strict regulation and approval process is hindering it from becoming public?