Did you know that overexposure to the sun can cause skin and eye injuries? While some sunlight is necessary, too much is dangerous, causing sunburn, premature aging of the skin, skin cancer, cataracts, allergies, and damage to the immune system. Though the average person gets 50% of his or her lifetime sun by the age of 18, everyone needs to be aware of the dangers of exposure to sunlight.

In this passage, what does the word “immune” most closely mean?



Resistance is the correct answer because human immunity keeps the body from contracting diseases or viruses. The other three words are opposite in meaning given the context of this passage.

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