Type 4 hypersensitivity is the second most common type of reaction. This type of reaction takes two days or more to develop. An example of this reaction is a rash to poison ivy. Type 3 is an ...

The Change Reaction founder Greg Perlman discusses how they’re working to help the community impacted by the California wildfires on ‘Fox News @ Night.’ ...

Sarah Vine and Andrew Pierce bring their own no-holds-barred opinions, insights and reaction (clue is in the title) to the biggest stories of the week. New episodes every Wednesday, wherever you ...