Our whole family had mild delta two months ago, even then we are now finishing quarantine after everyone catching omnicron. Neither vaccines or previous infecti

Our whole family had mild delta two months ago, even then we are now finishing quarantine after everyone catching omnicron. Neither vaccines or previous infection seem particularly effective at stopping re infection. The virus seems significantly different to previous iterations meaning it might as well be a different virus altogether. It felt like a medium flu for the adults and just bounced off the kids.