Interesting meme. Guns are designed to kill. It's the user of the weapon that is responsible for how it is directed.
What about vaccines? Are they dangerous by design? In that case also, it would be the user who's administration of the shot would be at issue. However the 1986 act giving immunity from civil liability to vaccine makers also provides protection to those giving the shots.
My argument is that civil liability is not the same as CRIMINAL liability. If you knowingly (or perhaps even unknowingly) participate in administering a bio-weapon you are guilty of a crime. Vaccine dangers have been known for decades.