Why is the mutation rate of the Influenza Type A virus higher than the coronavirus (Covid-19 or SARS-CoV-2)? The genetics of the two different viruses will need to be addressed 400-500 words

Why is the mutation rate of the Influenza Type A virus higher than the coronavirus (Covid-19 or SARS-CoV-2)? The genetics of the two different viruses will need to be addressed 400-500 words