Define the problem:COVID-19 is due to the new SARS-CoV2 virus that causes an acute infection with respiratory symptoms, to date, it has caused millions of cases and deaths around the world without exception. One of the hopes we currently have has been the development of safe and effective vaccination that aims to immunize and protect the population against the COVID-19 virus.2. Analyze the problem:Although governments tried everything possible to immunize on a massive scale, people in general did not have enough confidence to do so. In addition to the distribution, at first there were not enough doses to supply the entire population and that created even more mistrust in thinking that not all vaccines would have the same effectiveness. Governments had to try to implement procedures and protocols in a logical way so that they could safely create that all people had enough confidence to administer the vaccine. As time went by and the pandemic worsened, it was what determined that a large number of people decided to be immunized and today you can see more reliability in the effectiveness of the COVID 19 vaccine.3. Alternatives or solutions:1) Effective immunization through the creation of vaccines.2) The health sector can use the available resources to discover existing gaps and effective plans to address them.3) Health professionals and competent authorities must incorporate efforts in terms of resources, techniques and approaches to improve emergency preparedness and current health services.4. Choosing the alternatives: Choose the option that best responds to what you want to achieve.We can say that vaccination is the best alternative to prevent serious COVID-19 diseases and protect life. Vaccination reduces the risk of becoming seriously ill or dying from COVID. And it can also help reduce the risk of transmitting the virus to other people, including the risk of becoming seriously ill and dying, in people who are fully vaccinated. In addition to data from clinical trials, evidence from real-world vaccine efficacy studies shows that COVID-19 vaccines help protect against COVID-19 infections, with or without symptoms (asymptomatic infections). The effectiveness of vaccines in preventing hospitalizations has remained relatively high over time, although it tends to be slightly lower in the elderly and people with weakened immune systems.REFERENCES:C. Galván-Casas, A. Catalan