Viruses classified by risk group
Micro-organisms are classified into different risk groups depending on how dangerous they are for humans.
Risk Group 4
Pathogens in Risk Group 4 cause fatal illnesses in humans and therefore pose a risk to laboratory and hospital staff.
There is a very high likelihood that the population will become infected. For the most part, no effective treatment or prophylaxis exists.
Risk Group 3
Pathogens in Risk Group 3 may cause fatal illnesses in humans and also pose a risk to laboratory and hospital staff.
There is a likelihood that the population will become infected, but effective treatment or prophylaxis is available.
Risk Group 2
Pathogens in Risk Group 2 in certain instances can cause fatal illnesses in humans and therefore theoretically pose a risk to laboratory and hospital staff.
There is a very remote likelihood that the population will become infected, since effective treatment and prophylaxes exist.