WhatsApp Intervention to Assess the Effect of Messages in Adherence to Antiretrovirals in Young People With HIV in Peru

The goal of this clinical trial is to learn which type of messages is more efficacious to improve adherence to medication in young people living with HIV. The main question is aims to answer is: -Are messages designed by participants (self-designed) more efficacious than messages designed by health providers to improve adherence to antiretroviral treatment (HIV medications)? Researchers will compare both types of messages to see if one is better than the other in helping participants take their medications. Participants will: * Receive either messages designed by themselves or by health providers for 4 months. * Be able to chat with health providers at any time, with special focus regarding questions about their condition, medications and health services. * Complete questionnaires via WhatsApp describing how they are taking their medications, and how often they forget to take them. * Complete questionnaires via WhatsApp describing their opinion about receiving the messages and being able to chat with health providers.