29 hour JKO

Which is the BSL is for lethal agents for which there are no vaccines or other countermeasures - BSL 4 What is the optimal particle size for aerosol delivery of a bio-agent - 1-5 microns Which country deliberately did not follow the 1972 Biological Weapons convention even after signing - USSR Which is not a characteristic of tier 1 agents - easily treatable Which transmission-based precautions are most appropriate to prevent a disease which is spread by close respiratory contact or secret...