A new type of botulinum toxin — the most toxic substance known to man — has been discovered in the feces of a child. Botulinum toxin type H is the eighth type (types A-G being the first seven) to be ...

A new type of botulinum toxin – the deadliest substance known – has been discovered. Because it does not yet have an antidote, the DNA sequence behind it has been withheld from public databases. This ...