So many mosquito repellents are not really effective or only effective for a short time. Others are so toxic that you should only put them on your skin if it is imperative to protect yourself (and then not too often).
Mosquitoes are considered to be one of the deadliest insects in the world. This is because carry life-threatening parasites and viruses and they have a very high rate of reproduction. Every year more than a million people die from the consequences of mosquito bites.