Tuesday Q & A: Some head lice can be resistant to over-the-counter treatments

DEAR MAYO CLINIC: My child’s school has had a lice outbreak for two months. The problem does not seem to be going away. Is it true that some types of lice are resistant to over-the-counter treatments? Are there more potent options to eliminate head lice? ANSWER: Although they are often effective, over-the-counter treatments for head [...]
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