Why are experts concerned about Omicron?

[video width="1280" height="720" mp4="https://middleeast-business.com/wp-content/uploads/2022/01/WHOs-Science-in-5-on-COVID-19_-Why-are-experts-concerned-about-Omicron_.mp4"][/video]

If Omicron is less severe, why are people ending up in the hospital and dying from it? Is it true that everyone will eventually get Omicron? Why is it important to reduce transmission? WHO's Dr Maria Van Kerkhove explains in Science in 5.