Here is a good link with lots of information.

https://www.iamat.org/country/guatemala/risk/malaria

Malaria prevention is not a shot but a tablet and the best one to use is Malerone. Whatever you do be SURE you do NOT GET Lariam or a generic of Lariam.

Atovaquone-proguanil - What we take if we decide to take Malaria prevention pills: Brand names: Malarone, Malanil and others; generics available.

Mefloquine hydrochloride - the BAD STUFF Brand names: Lariam, Mephaquin, Mefliam and others; generics available.

Simply read the side effects of these two different drugs to see why you should not take Lariam. A terrible drug and some people have VERY serious effects.

Problem is most US doctors are not that familiar with Malaria. The side effects of Lariam can be really bad. So you need to be SURE you do not have a generic of Lariam.

Malaria is spread primarily by the Anopheles Mosquito. This mosquito is active from dusk to dawn so do not go up on deck after dusk or have your balcony door open. I probably would not take an excursion to ruins in a jungle. Use common sense to avoid exposure whether you take Malerone or not.

Whether you take the malaria pill or not is up to each person. When we have taken Malerone we have had no side effects but other people have, but not serious side effects like Lariam can have.