palacegirl77
As I said before, Covid levels are low primarily due to the lockdown. As lockdown eases, numbers of infections will rise. The risk of transmission is particularly high where large numbers of unvaccinated people meet in very close proximity, inside, over multiple hours - ie in schools.
Vaccination is not 100% effective. So the higher the number of cases, the greater the chance that someone whose vaccination has been ineffective will come into contact with someone who is infected.
Saying the cases are low now is not really all that relevant. We saw what can happen from a low base in schools from September to December, and almost none of the children in schools have been vaccinated so their is very little to stop infection once it gets into schools.