[The patterns of seasonal outbreaks of acute respiratory diseases].

The COVID-19 epidemic cause is considered to be "patient zero" contaminated by coronavirus infection in December 2019 in China. However, accumulated facts dispute this version of events. The first infected patient appeared in September in the United States, in December - in France.

[On motivations of adolescents to promote a healthy lifestyle].

There was studied the motivation of modern adolescents to promote healthy lifestyle. There were observed two arrays, including adolescent-schoolchildren aged 16-17 and 13-14 years in Moscow. The results showed that health occupied one of the first places among the positive motivations, being stable dominant in the period of 13-17 years.

[Clinical and hemodynamic characteristics of ischemic heart disease in patients with deficient body mass].

Aim: To elucidate clinical and hemodynamic characteristics of patients with ischemic heart disease and low body mass.

Material: Patients with stable angina (n=162) divided into 3 groups according to body mass index (below 25, 25-27 kg/m2 and above 27 kg/m2).

Results: Patients with low body mass index compared with those with intermediate values had worse clinical (arrhythmias, derangements of conduction, recurrent myocardial infarctions, cases with heart failure), hemodynamic (lower stroke volume and cardiac index, higher total peripheral resistance), and cardiometric (lower ejection fraction, larger diastolic volumes, greater relative myocardial mass) characteristics.