Can Omicron be transmitted during the incubation period?

Omicron is transmissible during the incubation period, although the level of contagiousness and corresponding prevention measures may vary under different circumstances. The detailed analysis is as follows:

The transmissibility of Omicron during the incubation period primarily stems from the virus's replication characteristics and transmission conditions. After entering the human body, the virus rapidly multiplies within the mucosal cells of the respiratory tract. Even before symptoms such as fever or cough appear, the viral load in the body may already reach a level sufficient for transmission. Respiratory droplets produced by coughing or sneezing, or aerosols released during talking or breathing, from individuals in the incubation phase may carry infectious virus particles. Close contact with such individuals—inhaling virus-laden droplets or touching contaminated surfaces—poses a risk of infection. This is a key reason why Omicron spreads so stealthily.

Individuals with potential exposure to疫情 should actively monitor their health, minimize close contact with family members while at home, wear masks properly when going out, maintain safe social distancing, and avoid crowded places. Hands should be frequently washed with soap and running water. Clothing should be cleaned promptly upon returning home. Rooms should be ventilated daily, and high-touch surfaces such as door handles and light switches should be regularly disinfected. A balanced diet, adequate sleep, and moderate indoor exercise help strengthen immunity. Any symptoms should be reported immediately, and medical attention should be sought without delay.