Three years. During the three years in COVID-19, the best epidemic prevention measures are still sealing control and nucleic acid, but it is becoming more and more accurate and frequent. A few days ago, the meeting of joint prevention and control mechanism in the State Council made it clear that where there is no epidemic situation, the nucleic acid detection should also be normalized and the dynamic zero clearing should continue.
Obviously, we still have a long way to go in nucleic acid detection.