Angela Merkel says that 60-70% of Germany is likely to be infected. That’s useful if people believe that it won’t infect that many. Example source, though you can google for others.
If they’re willing to believe a redditor’s summary, this one says that WHO says that 20% of infected people needed hospital treatment for weeks. (If they want primary sources, maybe you could find those claims in the links / somewhere else.)
Putting together 1 and 2 (and generalising from Germany to whatever country they’re in), they ought to be convinced that it’s pretty severe.
Angela Merkel says that 60-70% of Germany is likely to be infected. That’s useful if people believe that it won’t infect that many. Example source, though you can google for others.
If they’re willing to believe a redditor’s summary, this one says that WHO says that 20% of infected people needed hospital treatment for weeks. (If they want primary sources, maybe you could find those claims in the links / somewhere else.)
Putting together 1 and 2 (and generalising from Germany to whatever country they’re in), they ought to be convinced that it’s pretty severe.