There are currently active travel warnings for two countries in Asia: Japan and the Philippines. The travel warning for Japan has been in place for almost twelve years - since the reactor accident in Fukushima.
The warning for the Philippines notes that “there is an increased risk of terrorist attacks in several regions of the country” The Abu Sayyaf group particularly targets foreigners, according to the Foreign Office. The Foreign Office advises people to be “particularly vigilant in busy places and during unusual events” If a trip there is unavoidable, it is recommended that you contact the local authorities in advance. If a travel warning is issued for the chosen holiday destination, this can have an impact on your stay. It is strongly advised not to stay in the evacuated areas. If you are planning a trip to Italy, contact the Foreign office in advance for advice on how to get around the deng fever outbreak there. There is also a warning against visiting Machu Picchu in Peru because of the residents there.