I think it's a complicated picture. I have been following the research reports as best I can. One hypothesis is that children can 'catch' and test positive for COVID-19, but it is extremely rare for them to become ill. Apparently they have fewer of the ACE2 receptors which the virus locks onto, and they seem to shed many fewer viral particles. However, there have been reports this week of a handful of children becoming seriously ill with gastro-intestinal symptoms leading to sepsis whilst testing positive for COVID-19. However, these are extremely rare incidents, and I think that schools are likely to go back, the youngest first, from 1st. June, seniors in September. Apparently, local authorities have been told this is the plan. As for hugging grandchildren, when the time comes, it will depend on your own risk factors and your attitude to that risk. For myself, I can't wait until I can hug my 5 year old grandson again!