New Crown Nucleic Acid Test Swabs generally do not have a solution on them, which is placed in a reagent tube. Nucleic acid test swabs are used to collect pharyngeal samples, and to ensure that the sample collected is not contaminated, the swabs are sterile. The reason the swabs do not contain drops is to avoid any discomfort associated with the drops in the throat area of the person being collected and to avoid choking. After the sample is collected, the healthcare provider breaks the swab, leaving only the head of the swab, and puts it into a reagent tube with a red liquid. The sample is preserved because it is not immediately available for laboratory testing. The red liquid, called virus lysogenic protection liquid, prevents the breakdown of the new coronavirus proteins, which in turn prevents the collected samples from becoming ineffective due to time. Residents are advised to cooperate with healthcare workers and follow the arrangements to protect their own health and the health of others when conducting nucleic acid tests.