As the weather gets colder, more people tend to get sick, with many complaining about having a headache, sore throat or a runny nose.
It is often difficult to understand which illness you have as some of the most common ones - such as Covid-19, flu and cold - can have very similar symptoms.
Since Covid emerged in Wuhan, China, in December 2019, there have been several strains that have made it even more difficult to tell the difference between the virus and other illnesses.
