Personal isolation units for medical purposes; ventilation apparatus for medical purposes; air filtration apparatus for medical purposes; incubation apparatus for medical purposes; apparatus for maintaining optimal temperature, humidity, and other environmental conditions for medical purposes; apparatus for isolation of patients maintaining ventilation and air filtration for medical purposes; apparatus for medical purposes; ventilation hoods for medical purposes being patient ventilation apparatus in the form of a hood; isolation hoods; isolation units for medical purposes; hoods for isolation containing fan and air filter for medical purposes; hoods for ventilation for medical purposes containing fan and filter being patient ventilation apparatus; negative pressure hood for medical purposes; hoods for medical purposes; patient hoods; patient hoods for medical purposes; patient isolation apparatus; protective apparatus for medical purposes; protective units for medical purposes