In the covid-19 pandemic, there is no evidence to justify closing classrooms to interrupt transmission and protect the health of children. On the other hand, there is evidence of the harm caused to them by dropping out of school.

The pandemic has shown us that neither science nor engineering alone is capable of solving a problem in real time when the crisis is global, when local interventions are costly and of limited effect, when we have to act without having all the information.

A survey conducted by the COSMO-Spain team to find out the reasons why some people have not yet been vaccinated showed that most of them fear that vaccines are unsafe and their side effects. These results highlight the importance of rigorous communication of drugs that are considered safe and effective by all studies and agencies.

The misleading presentation of hospitalization data, ICU admissions or deaths in vaccinated and unvaccinated persons that we are seeing these days in some media and social networks are generating confusion about the effectiveness of these preparations.

A clinical trial in Brazil evaluated the effectiveness of a depression drug versus placebo in reducing the risk of hospitalisation for SARS-CoV-2 infection. Administration of 100 mg twice daily for ten days to high-risk outpatients with early diagnosis reduces the need for hospitalisation.

With the goal of vaccines reaching a huge part of the European population achieved, we must provide scientific evidence and action to ensure that all people have access to immunisation. We will find herd immunity by vaccinating and monitoring infections now more than ever.