Antimatter radiation
Antimatter radiation is an energy form which can be extremely hazardous to humanoid life. A byproduct of antimatter, prolonged exposure to this radiation could cause radiation poisoning and serious degenerative health effects and, in high enough concentrations, could even disintegrate organic tissue. ()

In 2375, The Doctor asked Harry Kim if he had come into contact with antimatter radiation as a possible explanation for why Kim's skin was glowing. ()

In 2378, the crew of the , while on their first official mission for Starfleet since being stranded in the Delta Quadrant, encountered a planet whose atmosphere had been contaminated by high levels of antimatter radiation. As a result of their exposure, the planet's inhabitants had developed serious health problems including radiation poisoning, birth defects, and tissue damage. The Voyager crew soon came to learn that Friendship 1, a probe launched by Earth in 2067, was the cause of environmental damage. Encountering the probe, the inhabitants examined its antimatter-based propulsion system, extrapolated it and developed their own energy-generation technology based on antimatter. However, a containment failure released a large amount of antimatter, resulting in the radiation poisoning. Eventually, the Voyager crew were able to reverse the damage by utilizing specially-modified photon torpedoes to deliver a catalytic agent which created an isolytic chain reaction, recombining the nucleonic particles in the planet's atmosphere. ()

See also
Theta radiation
Radiation