Sterilite

Sterilite was an anti-infective light used during surgery and in the general treatment of wounds to produce rapid death of harmful microorganisms and parasitic agents.

Spock was placed under the sterilite during his stabilization period, after being shot in the liver by a flintlock on Neural. (TOS: "A Private Little War")

In the 24th century a sterilite protection could be placed on a person when beamed on board a starship completely sealing that person from the ship's environment. (TNG: "Unnatural Selection")