How to Differentiate Between Normal Stomach Flu or Symptoms for COVID-19? Covid can cause gastrointestinal problems in people. However, it can also be common stomach flu but being precautious is the best possible answer to our problems. Experts help differentiate between the two. | 10 May 2021 11:32 AM GMT COVID can affect the human body in numerous ways. The country is in a state of humanitarian crisis and the death toll is increasing at a rapid pace. COVID-19 has symptoms alike many other non-specific diseases, making it more confusing to detect it. People who have contracted the virus have shown various symptoms like fever, cough, headaches, diarrhoea, pain in joints, nausea, cramps, and more.