Lmao, I'm sure you don't have a Master of Mathematics in Statistics but you don't need one to understand the basics.
The issue isn't the number of people it has affected... it's the rate at which it's growing and no signs of it slowing yet.
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This is exponential growth like 2^x. Read all about it:
https://en.wikipedia.org/wiki/Exponential_growth
As plain numbers, you can see exponential growth in S Korea:
Feb. 22: 433 cases (current day, still in progress)
Feb. 21: 209 cases
Feb. 20: 111 cases
Feb. 19: 58 cases
Feb. 18: 31 cases
This isn't linear, and it's certainly not
logarithmic.
Also, you're comparing COVID to malaria, but malaria doesn't really effect the first world at all and is quite contained there. Seeing countries like SK unable to control it is what is freaking people out.
Malaria map below.