as for fruit and veg- timing is not great - what is going to grow if we plant now? And that might be ok for people int he countryside, but the vast majority live in towns and have NO access to anywhere to grow anything.
My grand-daughter has a condition which means she has to eat lots of green vegetables, to keep her red blood cells up. They have a large gardenw where they could easily grow stuff next year- but it ain't going to happen in October!
But as said, food will probably be a real problem, but a comparatively 'minor' worry compared to so many things as mentionned above. The War? Well, agreed, we did not use isotopes for cancer diagnosis or treatment, for sure. Nor many other medicines or antibiotics, etc, etc- and people, including 1000s of children, died of common diseases. That's OK, then.