There are plenty of people reporting very similar sets of symptoms prior to March 2020, and anecdotally I believe children in schools have been manifesting their covid infections as sickness, diarrhoea and headaches, but have not been tested until now. Yes please continue the research and also can anyone tell me, if you have the virus in your gut with stomach pains and diarrhoea, is it clear that a nose/throat swab test will pick it up? Is it possible that you have the virus in your gut, but do not have enough viral load in your respiratory pathway to show as a positive case?