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> PCANS nasal spray could effectively block infection from an influenza virus (PR8) at 25 times the lethal dose

A certain amount of influenza virus acts as a toxin and just kills you?



The paper says that 100% of the control group died. (This is a mouse model and a virus specifically selected to be deadly.)

So, not "toxic", and not the usual LD50 that's often misreported as "lethal". But still, the language seems appropriate.




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