Public health officials strongly advise against in-person gatherings and activities, such as door-to-door trick-or-treating, in-person costume contests, large dinner parties with non-household members, haunted houses, and fall carnivals.Public health officials strongly advise against in-person gatherings and activities, such as door-to-door trick-or-treating, in-person costume contests, large dinner parties with non-household members, haunted houses, and fall carnivals.