P3 and P4 laboratories are biosafety protection level 3 and 4 laboratories. Biosafety protection laboratories are categorized into four levels according to the degree of hazard posed by microorganisms and their toxins, with Level 1 being the lowest and Level 4 being the highest.
The third level applies to pathogenic microorganisms or their toxins that infect people with serious or even fatal diseases mainly through the respiratory route; the fourth level applies to pathogenic microorganisms or their toxins that have a high degree of danger to human beings, are transmitted by the vapor-soluble route or through an unknown route of transmission, and for which there is currently no effective vaccine or treatment method.
Expanded InformationP3 laboratories are divided into two categories: cellular level and animal level, and animal level is divided into small animal level and large animal level.
China's first P3 laboratory was built in 1987, when it was mainly used for AIDS research.
The P4 laboratory refers to the biosafety level 4 laboratory, which is specially used to carry out research on virulent infectious diseases, and is the highest level of global biosafety, and in August 2017, the P4 laboratory in Wuhan was officially operated. According to relevant experts, the safety measures of the P4 lab are more stringent than the P3 lab, and researchers entering the lab should not only wear fully enclosed protective clothing, but also carry oxygen cylinders.
Baidu Encyclopedia - P3 class lab