Deaths are also unreliable because a) COVID-19 deaths are being reported differently as a notifiable disease (in the UK at least) as compared to, say, influenza

Deaths are also unreliable because a) COVID-19 deaths are being reported differently as a notifiable disease (in the UK at least) as compared to, say, influenza and b) autopies are not being carried out on COVID-19 cases due to how contagious it is.