A burn is a type of injury to skin , or other tissues, caused by heat, electricity, chemicals, friction, or radiation.Burns that affect only the superficial skin layers are known as superficial or first-degree burns.
View all...Many insects, spiders, reptiles, and other animals can bite or sting humans. A person's reaction to bites and stings depends on the type and amount of venom (if any) injected into the bite.
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