I don't expect people are going to go hungry in rich countries due to the coronavirus. My reasoning:
• The fraction of the population in these countries involved in food production, processing, distribution and grocery sales is not that high — surely under 5%. This means many of them can and will keep going as 'essential workers' even under a suppression strategy.
• It also means that if some of them are unavailable due to illness they can be replaced by hiring people from the remaining 95% of the population. While some of these jobs are highly specialised, others, like truck driving and retailing, could be replaced quickly in an emergency situation.
• There's lots of slack in the system and margins to push on. We could probably eat 10-20% fewer calories for a while and it could even be good for our health. Food processing factories can reduce or change their range to increase throughput (and indeed already are). People sitting at home need less food. We can be more careful to reduce food waste at each stage. Etc.
• Stockpiling early in March will have kicked the system into high gear. Everyone knows food is essential. There will be a big effort to stop people going hungry from businesses and governments.
• While a shock to the system, the pandemic is not like a nuclear war. We have had weeks to adjust and still have a few more. The world has a few months worth of calories sitting around, which sounds like it's probably enough of a buffer for this one.
• International freight is still mostly moving and doesn't account for any meaningful fraction of cross-border infections. So it should keep moving.
• The supermarkets say they've got things handled.
• I've heard of no reports of people starving in China, or Italy, or elsewhere.
• Food prices and food futures aren't way up, suggesting markets aren't expecting great food scarcity.
I've stocked up with 45 days worth of calories, but I now think this is an anti-socially large amount, so plan to draw it down before buying more.
The above is just an amateur take, so shouldn't be completely reassuring. But there's a lot of things to worry about these days, so I'm inclined not to think much more about food for now personally.