Since you are planning to visit Asian countries which is one of high risk places of dengue, it iis safe to get vaccinated two weeks before the travel.we provide Qdenga dengue vaccination which is licensed in the UK which is effective in preventing the infection dengue. The cost of the dengue vaccine is £ in our Touchwood Pharmacy. Please book an appointment to get vaccinated at Touchwood Pharmacy in Bromley (Beckenham,Chislehurst,BR1 and BR2)