Kim Kardashian West and Kanye West's 2-year-old son Saint West recently spent three days in the hospital for pneumonia. 

The toddler is now at home and feeling fine. His mom took to Instagram to update his condition.

"My precious baby boy is so strong! After spending three nights in the hospital & seeing my baby get multiple IV’s and hooked up to oxygen machines, our end of year was challenging. Pneumonia is so scary. I just want to thank every nurse & doctor out there who works so hard around the clock. We are so grateful for you all! He’s home and all better. He’s so resilient I’m sure he will still say the ambulance ride was cool! My strong Saint," Kim wrote.

Over one million children under the age of five will die from pneumonia worldwide every year.

So it is a really scary sickness for a child of Saint West's age to catch, and it's good to see Kim and 'Ye are starting the new year without that hanging over their heads.