More or less serious accidents are possible.
contamination
Contaminationexposure
Contact
stem cells are not harmful to people. But stem cells are cells that do not have a specific function but as time goes on they develop a function.
Microorganism are sometimes only harmful in certain environment. Some organisms that may be harmful to some people or animals may not be harmful to others.
contamination
Contaminationexposure
Contaminationexposure
Contaminationexposure
Contaminationexposure
Contaminationexposure
Contaminationexposure
Contamination
Contamination
Exposure
Exposure
Secondary contamination