No, LB, unless there’s a particular person with a severe allergy, mosquito bites are not a sakana. They’re not even considered tzaar to allow a d’rabonon to be violated, and certainly not a d’Oraisa, so you couldn’t trap or kill it on Shabbos or Yom Tov (which would probably be an issur d’rabonon because people don’t use the dead mosquitoes).
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