 it is hard to know the difference between covid19 and flu it is hard to know the difference between covid19 and flu healthy mon 3082021 1202 it is hard to know the difference between covid19 and flu although there are some differences between flu and covid19 they also share signs and symptoms it can be very difficult to distinguish between the symptoms of covid19 influenza and a cold if you have any infection or respiratory symptoms selfisolate follow your state or territory guidelines about covid19 testing and contact your gp or pharmacist for further advice do you or the person you re with have  a headache muscle pains joint pain a runny nose nausea vomiting or diarrhoea fatigue loss of appetite recent onset blocked nose flu and covid19 vaccinations are important the australian technical advisory group on immunisation atagi has stated that covid19 and flu vaccines can be given at the same time talk to your gp or pharmacist for more information 2  