Ключевые слова: 3035, 35s, activities, adult, american, attention, audience, auditorium, caucasian, coaching, communication, conference, confident, corporate, distance, doctor, engagement, european, event, expressive, face, general, hall, healthcare, leader, lecture, male, man, mask, medical, medicine, motivation, participants, people, person, portrait, positive, presentation, professional, public, safety, seminar, social, speaker, stage, success, uniform, young,