Schizophrenia is a serious mental disorder characterized by delirium and hallucinations (positive symptoms), as well as abulia, depression and cognitive impairment (negative symptoms), which entails a large socioeconomic burden requiring early diagnosis and timely treatment. This disease has a multifactorial origin, being the prenatal stress caused by viral infections one of its possible factors; this due to, it could harm neuronal development. This research aims to review the knowledge on prenatal SARS-CoV-2 infection as a risk factor in the development of schizophrenia. The proper development of the nervous system requires an anti-inflammatory state of the maternal immune system during the second trimester of pregnancy. In this period, viral infection processes, such as Covid-19, act as proinflammatory stimuli that alter the molecular environment and induce "maternal immune activation"...

A review of the various aspects surrounding the varicella-zoster virus is conducted, addressing its morphology, epidemiology, and etiopathogenic mechanisms underlying the disease. Likewise, the different clinical presentations are analyzed, such as varicella, which constitutes the primary infection, and herpes zoster, resulting from virus reactivation. Finally, diagnostic methods, as well as preventive and therapeutic measures, are detailed.