The common cold is mostly caused by rhinoviruses, which are very different. Not just a different family, but a different order.
The reason we don't have a vaccine for the common cold is not because it's impossible to make one. We could.
The problem is, there are too many types of rhinovirus.
Even if we developed vaccines for the most common hundred, it would continue to mutate.
Covid is not rampant because we're locked down.
The chance of catching it and dying is substantial.
The UK has one of the highest death-rates per capita - over 600 per million. Compare to e.g. the USA, about 340.
(, Mon 22 Jun 2020, 9:09, Reply)