How effective is a double layer of mosquito netting at stopping fungal spores ? The workers in the photos don't seem to be wearing any sort of protection equipm

How effective is a double layer of mosquito netting at stopping fungal spores ? The workers in the photos don't seem to be wearing any sort of protection equipment either. This seems like a very carelessly conducted experiment. The fungus is in the wild at this point. Fungi are very persistent and our immune system is not well equipped to deal with them, much more care should be required to avoid release in the environment of a pathogen agent not thoroughly tested and evaluated.