Can alcohol spray express packaging be effectively disinfected?

Recently, several confirmed cases related to positive international express delivery have been discovered, which makes people worry about the risk of human-to-human transmission. Pay attention to disinfection when receiving express delivery. Can alcohol spray express packaging be effectively disinfected? Can COVID-19's nucleic acid positive be transmitted to people? Let me introduce you.

Can alcohol spray express packaging be effectively disinfected?

A few days ago, National Health Commission official WeChat issued a reminder that when receiving express delivery, comprehensive disinfection of external packaging can play a certain role, but there are also shortcomings.

According to an article published by National Health Commission, first of all, simply spraying several times on the surface of an object cannot cover everything, and the scope of disinfection is not comprehensive enough. Secondly, it will be over after a few sprays, and the disinfection time of items can not be completely guaranteed. If the disinfectant consists of alcohol, alcohol will be in danger of burning when it meets an open flame.

The article suggests that it is best to wear masks and gloves when receiving express delivery, take off gloves in time after handling parcels, wash hands with running water or use hand disinfectant.

Citizens should do personal protection when receiving express delivery, especially overseas logistics express delivery, wear masks and disposable gloves, and it is recommended to bring 75% alcohol or chlorine-containing disinfectant (such as 84 disinfectant) to disinfect watering cans or paper towels; After picking up the bag, it should be sprayed and disinfected immediately. It is suggested to unpack the package on the spot, disinfect the hands after unpacking, and properly handle the express package. Express parcels should not be taken home as far as possible, and should be treated according to the classification of domestic garbage. When you get home, you need to wash your hands under tap water with soap or hand sanitizer or disinfect them with hand sanitizer. Do not wipe your sweat or touch your eyes, nose and mouth before disinfection.

Can COVID-19 nucleic acid positive articles be transmitted to people?

In this regard, zhaowei, a professor at the School of Public Health of Southern Medical University, said that positive nucleic acid does not mean that there must be a live virus on the surface of the object. After the virus exists on the surface of an object for a period of time, it will lose its vitality, but the nucleic acid of the virus still exists, and there will be a phenomenon that the nucleic acid on the surface of the object is positive. If the virus of positive articles is to be transmitted to people, at least three conditions must be met:

There must be a source of infection, that is, the virus on the surface of the object must be a live virus, not a virus corpse.

To have an appropriate route of transmission, for COVID-19, it is to enter the human body through the respiratory tract.

There should be susceptible people, that is, people who come into contact with them should have no immunity.

Why is international mail still "toxic" after disinfection?

Zhang Liubo, chief expert of disinfection science in China CDC, said that the epidemic situation in COVID-19 is still going on around the world, and mail and goods entering China may be polluted by COVID-19. Some viruses may die gradually during transportation, but under certain conditions, some viruses will not die and the goods are contagious.

Experts also said that COVID-19 will not only pollute the packaging of mail, but also pollute the goods inside. The relevant personnel in the express delivery industry did not get sick first, indicating that the surface protection and disinfection effect of mail is good, but we should attach great importance to the spread risk of items in the package.

How to ensure the safety of receiving international mail?

Experts suggest that the public can reduce or suspend non-urgent international mail. However, if it is really an emergency to receive international mail, it should be strictly disinfected and protected when contacting the mail.