There’s nothing quite like a mail-order disease to propel a pathogen into notoriety. In 2001, several envelopes containing spores of the bacteria Bacillus anthracis were shipped across the United States, infecting those exposed with anthrax. This was hardly the first time B. anthracis cropped up as a prominent pathogen or agent of biological warfare; the bacterium has a sordid history as a major player in biological warfare in the past century, along with a biblical history of outbreaks.
Botulinum neurotoxin is the deadliest substance on Earth; a single gram would kill over a million people if inhaled and 8.3 million if injected. So, naturally, humans have developed a specific method to inject it into our faces. Believe it or not, this neurotoxin is the primary component of Botox!