Just because it is winter time, one is not safe from getting poison oak. In the fall, the leaves dry up and drop off the poison oak plant and the sap / oil gos down into the root system. All one has to do is dig into the roots and presto a rash can appear. So if you are one of the unlucky ones that can catch this crud, forget the " Calamine Lotion ". The best product that will stop this crud dead in it's tracks from spreading, that I have found, is " Tecnu ". Tecnu can be found at most stores in poison oak country.
Poison oak can break out and spread very fast, so it is best to have a bottle of Tecnu close at hand. The second you feel the itch and burning, apply the Tecnu. This is a must have item in any First Aid Kit for those who break out with poison oak!
About 10 years ago, one winter in December, my brother got this crud so bad that he ended up in the emergency room. On my way home I started breaking out on my arms. By the time I got to a little general store in Southern Oregon, the poison oak was getting bad. I asked the lady at the store if they sold calamine lotion for poison oak. She went and got a bottle of Tecnu and told me that the loggers in the area swore by this stuff and now I swear by it also.
Hope this info will help others out and keep them safe. Ron