Why didn't I change the code when I received the message that the nucleic acid was positive?

It's cancelled. According to the epidemic prevention and control center, as of February 27th, 2022, 65438+, the national epidemic group had been released, and the code changing procedure was cancelled after receiving the short message with positive nucleic acid, so there was no code changing. Nucleic acid is a general term for deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). It is a biomacromolecule compound polymerized from many nucleotide monomers, and it is one of the most basic substances in life.