Corona is not the flu but they have much in common. Influenza mutates freely so the vaccine is always an educated guess that works better some years than others. Every year hundreds of thousands of us get the flu and even with take up of the vaccine, on average 17,000 die. Of those that do die the vast majority die with flu, because they are already weakened, frail and elderly.
Sometimes young and outwardly healthy people do die from the flu usually because they develop pneumonia. How many times have you heard people say they had “a touch of flu” most of us are not scared of it because it is so familiar, after all we call it ‘The Flu” not many diseases have become a noun! But there is no getting away from the fact that influenza is a very dangerous disease. Exposure to flu gives you partial protection to later mutations because it is not a new virus and your immune system has a head start.
There has been much debate as to whether being infected with covid will protect you from subsequent infection. It is highly likely that if you have been exposed to Covid19 whether you had symptoms or not you will be immune to this version and you may have some protection to further outbreaks.
Because Covid19 is a novel virus it may behave unpredictably so we will have to remain on our guard and maintain hand washing and sensible social distancing when it returns(probably coinciding with the flu season)