Does the Omicron variant spread through the air?
Dec 02, 2025
Source: Cainiu Health
Dr. Ren Yi
Introduction
Under normal circumstances, the Omicron variant can spread through the air. Indoor spaces should be ventilated daily by opening windows twice—once in the morning and once in the afternoon—for at least 30 minutes each time to reduce aerosol concentration. Wear masks properly when going out, and do not remove them casually in crowded places or while using public transportation. Wash hands frequently with soap and running water.
Under normal circumstances, the Omicron variant can spread through the air. The specific analysis is as follows:
The Omicron variant can disperse in the air in the form of aerosols. When infected individuals cough, sneeze, or talk, they release respiratory droplets containing the virus. The smaller droplet nuclei lose moisture and become aerosols that can remain suspended in the air for hours or even longer. These particles are tiny in diameter and can travel long distances via air currents. Inhaling virus-laden aerosols may lead to infection, even without direct contact with an infected person. Particularly in enclosed spaces, aerosols tend to accumulate, increasing the risk of transmission.
Indoor areas should be ventilated daily by opening windows twice a day (morning and afternoon), each time for at least 30 minutes, to reduce aerosol concentration. Wear masks properly when going out, especially in crowded places or while using public transportation, and avoid removing them casually. Wash hands frequently with soap and running water, and clean hands promptly after touching public facilities such as elevator buttons and door handles. Maintain a one-meter social distance, avoid poorly ventilated enclosed spaces, and cover your mouth and nose with a tissue or your elbow when coughing or sneezing to reduce opportunities for virus spread.
