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Stomach acid is part of the body's non-specific first line of defence. It is hydrochloric acid and while it does us no harm, it is strong enough to kill any pathogens that have been caught in ...

Cleveland Clinic virology researchers have found that a specific protein modification to the immune protein MDA5 is key to how human bodies detect and respond to viruses and viral replication.

Israel's first line of defense, a missile defense system developed by Rafael Advanced Defense Systems, is labeled the Iron Dome. It was first deployed in 2011, and has since rebuffed and destroyed ...