COVID-19
Treatment of acute COVID-19

Richard (42 years old)

Richard is a 42-year-old investor and managing director of a tech start-up. He is a health and fitness enthusiast who strives to remain at the prime of his health. His BMI is 21 kg/m2. Since 2020, he has been overly cautious about his health and often gets worried about being infected by COVID-19. When suspecting exposure to COVID-19, he starts taking “immunity shots” that are herbal concoctions. He has been consistently taking vitamin C and zinc, among many other vitamin and mineral supplements.

His wife tested positive for COVID-19 10 days ago and he started taking “immunity shots” in addition to vitamin supplements. He has developed diarrhoea since yesterday and frantically calls you to understand his illness.

What is the likely cause of diarrhoea in this patient?