A confirmed dengue infection may give you some protection for the next two or three months. But this protection does not necessarily last in the longer term.1
In general, when you get an infection, your body remembers it. This means if you get the infection again, your body deals with it faster. Vaccines work in the same way – by showing your body what a particular virus or bacteria is like, you’re more likely to be ready to fight it in the future.
Dengue is caused by a virus that can get into your body from a dengue-infected mosquito bite. Your body can fight the infection to help you recover.2 But there are four slightly different varieties of the dengue virus, which doctors call DENV-1, DENV-2, DENV-3 and DENV-4.1
This means that having dengue only protects you against one of these four types and you can become ill with dengue again.1 For reasons that scientists don’t completely understand, you are more likely to become seriously ill if you get dengue a second time.2 So it’s important to remember, having dengue once doesn’t make you entirely safe from it.