Localised panic is never really something which should be used to set bigger policies - people are also stopping buying Corona beer, so perhaps their behaviour is not the best to follow 🙂. AFAIK, there are only 20 confirmed cases currently in the whole of the US (None in Nevada). However, presumably if the situation does get worse the appropriate advisory action will be taken and of course, it's up to individuals whether to travel. Perhaps though, wise to check any travel/ticket polices about refunds due to pandemics, etc - just in case. 🙂