The main hazards of Omicron for children under 5 years old are muscle aches, coughing, pneumonia, and in severe cases, even death. Omicron is a mutated strain of the new coronavirus. The danger of Omicron is mainly related to the spiking protein, which has 32 mutations and is much more contagious. Children under 5 years of age may get muscle aches and pains when infected, and it also affects the respiratory system with coughing and pneumonia, which can cause death in severe cases. However, with vaccination, the mortality rate has decreased and there are many positive people who are asymptomatic infections. If Omicron can infect more people through airborne transmission, so be sure to take precautions, wear a mask, and avoid gatherings.