Epidemiological characterization of COVID-19 in children under 18 years old in Mexico: an analysis of the pandemic.

Objective: The study aimed to describe the characteristics and risk factors associated with disease severity across six waves of COVID-19 in the pediatric population in Mexico.

Methods: A cohort study was conducted using data from the Mexican Ministry of Health, covering the period from March 2020 to March 2023. The dataset included patients under 18 years of age with confirmed SARS-CoV-2 infection.

Missed opportunities for prevention of congenital syphilis.

Background: The WHO presented the initiative: "Global elimination of congenital syphilis (CS): rationale and strategies for action". It establishes that CS is a preventable disease that can be eliminated.

Objective: To estimate the proportion of missed opportunities for prevention (MOP) of (CS).

Cerebral haemodynamics in cirrhotic patients with hepatic encephalopathy.

Background & Aims: Factors other than elevated levels of ammonia may be implicated in hepatic encephalopathy (HE) pathophysiology, including abnormal cerebral haemodynamics. Transcranial Doppler ultrasonography (TCD) evaluates cerebrovascular structural integrity and reactivity, through pulsatility index (PI) and breath-holding index (BHI) respectively. The aim of this study was to evaluate cerebral haemodynamics by TCD in patients with compensated and decompensated cirrhosis, and patients with and without HE.