Airborne Contagion and Air Hygiene: An Ecological Study of Droplet Infections

aerodynamic constant aerodynamic dimension aerosol air centrifuge air changes air disinfection air hygiene airborne contagion airborne parasites animals atmosphere atomized droplets average bacilli bacteria bactericidal bacteriological breathed cent Chapter chickenpox coarse concentration contagious potential contagium cubic feet cubic foot diameter dilution disinfection of air droplet infections droplet nuclei dust-borne infection dynamic E.coli effective contact rate epidemic epidemic potential experimental experiments exposed Figure flow fluid foot-watts fraction ft./min Germantown Friends School glycol vapor grades increase indicated indoor influenza irradiated classrooms irradiated schools lethal exposure lethes liquid logarithm lower lung measles measured microns mortality mumps petri plate plate pneumococci primary schools quantal quantitative rabbits radiant disinfection radiation Raoult's law re-infection reaction reduced relative humidity resistance sampling sanitary ventilation sedimentation settling velocity streptococci surface susceptible pupils Table threshold sanitary ventilation tion total number tube tubercle tubercle bacilli tuberculosis ultraviolet light unirradiated ventilation per susceptible virus volume vulnerability ward