With local health centres already stretched to the limit, staff are worried about how they will cope with giving so many vaccinations next year, following the government's Covid-19 vaccination strategy announcement this week.
Malaga province has over one million people with only 4,000 existing nurses to do all the work, they say.
"Just thinking about it," confessed one health centre nurse, "is making us quiver".
Unions say it is impossible to take on more people as there aren't enough with the skills and they are urging the regional government to lure back Spanish health workers from overseas.
Marbella council has already offered up the resort's congress centre for vaccinations if needed.