February 29th is Rare Disease Day- a day celebrated internationally to bring awareness to the 7,000 different types of rare diseases in the world. Globally, 300 million people are affected by a rare disease. Those fighting rare disease face unique struggles.  While there are millions affected by rare diseases- about 50% of rare diseases don't have a disease-specific foundation supporting funds or advocating for the disease. Also, many times common symptoms hide underlying rare diseases, leading to misdiagnosis and uninformed treatment at a later stage. In honor of rare disease day, take a moment to learn more about different rare cancers and diseases such as mesothelioma, a rare cancer caused by exposure to asbestos.