Hi Angela
Like all countries that are warm and have a fair amount of rainfall, Cuba does have mosquitoes but they are nothing to worry about. Just pack a good mosquito/insect repellent and bear in mind that they are most likely to bit at sunrise and sunset.
Your doctor will know best whether there is a malaria risk or not, so I'm sure you will be fine.
Have a great holiday!
Kind regards,
Olly, your editor