Space agencies around the world have been strictly prevented from entering the International Space Station by the new crown virus, and microbes have been spotted on the International Space Station.

NASA medical personnel: strict prevention of the new crown virus into the International Space Station Nur Sultan March 31 According to the Russian satellite news agency reported on March 31, the International Space Station in April will face the rotation of astronauts, NASA is taking strict measures to prevent the new coronavirus into the space station. On April 9,
, two Russian and one American astronaut swerve from the Baikonur Cosmodrome in Kazakhstan on a Russian Soyuz MS-16 spacecraft to the International Space Station.
the three astronauts have arrived in Baikonur and are undergoing specific "health and stabilization" steps, including a two-week quarantine period, according to NASA.
photo posed with astronauts Andrew Morgan, bottom, left, and Jessica Mayer at the International Space Station on October 18, 2019.
/AP) - NASA medical staff eras at Bacsanova is responsible for providing medical assistance to astronauts during spacecraft launch and landing.
Russian satellite news agency quoted her as saying that NASA had taken "enhanced" security measures to minimize the number of staff involved in rocket launches and return capsule sourcing the virus, which must be subjected to strict medical isolation, given the risk of all people contracting the new crown virus.
Batsmanova said that national space agencies have been working to prevent any virus from entering the International Space Station, "given the enhanced security measures, the new crown virus into the International Space Station is very unlikely."
, a Russian cosmonaut and two American cosmonauts who are about to complete their mission on the space station are scheduled to return to Earth on April 17 aboard the Russian Soyuz MS-15 spacecraft and land near Jezkazgan, Kazakhstan.
Russia's National Space Corporation said there is no need to delay the return of astronauts to the International Space Station due to the new pneumonia outbreak, Russian experts will arrive at the landing site to pick up astronauts.
the safest place in the world is probably the International Space Station? Some microbes that do not pose a danger to humans on Earth may turn into pathogenic microorganisms in space, threatening the safety of astronauts.
the new crown virus began to outbreak in the world in early March, according to the World Health Organization data, as of April 6, 16 pm Beijing time, the number of new crown deaths reached 67,594.
With the spread of the virus, some netizens say that the safest place in the world is now the International Space Station.
in the eyes of the general public, the International Space Station seems to be a distant from the earth, human beings in space in a "world-class source."
but is that really the case? Although in the long history of biological evolution, humans in the battle with smallpox, myelitis, plague, cholera and other diseases, always have the upper hand.
but some experts say that in space microgravity environment, cosmic radiation and other factors, viruses, bacteria and other microorganisms have more opportunities, astronauts "in the middle" of the risk is greater.
microbes have been found on the International Space Station and on Earth, as well as on the International Space Station, NASA has identified four major microbiomes, including staphylococcus, E. coli, Bacillus spores and red yeast, when it classified microbes on the station.
scientists point out that similar bacteria have been found in ordinary Earth environments such as offices, gyms and hospitals, so the space station is more similar to other "artificial environments" frequented by humans.
researchers found that among these microorganisms, the main pathogenic bacteria include staphylococcus, streptococcus and micrococci, among which, epidermis staphylococcus and human staphylococcus can cause skin infections and visceral tissue infections;
, some microccicoccis can be found in the human skin, pharynx and eyes, and when astronauts' resistance decreases, it can cause meningitis, septicaemia, arthritis, and so on.
1970, when NASA launched Apollo 13, astronaut Hayes returned with a severe urinary tract infection, which was later discovered to be a copper-green pseudomonas infection.
other studies have shown that between March 1995 and June 1998, there were several microbial infections of astronauts on a space station, including conjunctivitis, acute consorium failure and oral infections.
2018, NASA tested samples of E. coli brought back from the International Space Station and found that they were genetically similar to some of the E. coli on Earth, which have been proven to be highly infectious to people with low immunity.
in addition to threatening the health of astronauts, microbes have also damaged the structural materials of the space station and spacecraft.
the structure of the Mir space station was corroded by microorganisms, creating a 2 mm depression;
" a survey of the early symptoms of micro-damage to a segment of material on the space station showed that more than half of the 30 sites where the material was slightly damaged were caused by microbial contamination. Xu Yanyan, director of the space microbiology laboratory at space-to-space technology group co
" Space Shenzhou Biotech Group Co., Ltd., said.
the usual harmless human and animal viruses on the first day change face in the human body's intestines, lungs, skin and other tissue symbiotic micro-organisms, including bacteria, viruses and fungi.
these symbiotic microorganisms have become an integral part of the human body and can live in peace with humans.
and on the space station far from Earth, microbes and astronauts are facing a whole new environment.
"some microbes that do not pose a hazard to humans on Earth may turn into pathogenic microorganisms in space, threatening the safety of astronauts and, in severe cases, preventing missions from proceeding properly."
" Xu said that microbes in space due to environmental pressure and changes, space radiation will cause microbes to mutate, space microgravity will also cause micro-organisms to undergo some physiological and biochemical changes, such as toxicity, pathogenicity and resistance will increase. in addition,
, the body's immune function also declines in space, which is reflected in both nonspecific and specific immune systems.
in ground-based experiments to simulate weightlessness effects and experiments in space, the lymphatic organs of the experimental animals have atrophy to varying degrees, which is one of the important factors leading to decreased immunity. "Immune cells are like a moving army in the human body, moving through blood and lymph nodes between the bone marrow, thymus, spleen and more than 600 lymph nodes, and wherever there is a virus invasion, they fight wherever they are," explains Wang Lixin, a professor of immunology at the Southeastern University School of Medicine in
.
However, in the microgravity environment of space, the microdynamics of immune cell flow change, which may affect the development of immune cells, and may also affect the movement and distribution of immune cells.
" However, in Xu's view, astronauts in space will have a decline in immunity, for a variety of reasons, in addition to microgravity and other space environmental factors caused by biological effects, work pressure, biological clock disorders, sleep quality decline, loneliness and other subjective factors, may lead to the astronaut's immune system function, resulting in a decline in their ability to resist pathogens.
"There are viruses that appear to sleep in the human body, mainly because they are suppressed by the immune system, rather than realinated, and may be awakened if the body's immunity drops during space flight."
said, "If astronauts have a cold fever in space, the consequences will be more serious than on the ground, the infectious nature of the cold makes other astronauts in confined space more susceptible to infection;
," Xu said.
want to do evil in space is not so easy, even if there are more viruses, humans will always have a way to crack them.
"To prevent the Earth's viruses from being put into space, spacecraft in the construction, testing, transportation and launch before, to maintain the absolute cleanliness of the environment, if necessary, but also to dry heat sterilization, radiation sterilization and other microbial killing treatment, to Mars and other potential extraterrestrial planets as the target of the probe, such as microbial protection.
," Xu said.
If the spacecraft's components and the air, food and water inside are not contaminated, the remaining sources of infection are the astronauts. In order to avoid the virus being put into space, the
will also be medically quarantined and quarantined before the astronauts carry out a space mission to ensure that they do not carry the active virus into space.
even if the microbes were lucky enough to be brought into space, they would need to escape all kinds of human sieges if they wanted to survive.
, astronauts regularly perform microbiological testing, cleaning and disinfection of the interior surface of the capsule during the orbit of the International Space Station.
efficient filtration film in the spacecraft will help remove microorganisms from the air in the capsule, while microbes in the water system are removed mainly by adding silver or iodine ions to the water.
while ensuring that the virus is not taken into space, astronauts will generally need to go through 2 to 3 weeks of medical isolation after returning to Earth after a space mission. "At the moment, no viruses that exist independently of the host in space, so don't worry too much,"
.
however, Mars is an extraterrestrial planet, the most likely extraterrestrial, therefore, the future manned Mars exploration activities must pay attention to protect astronauts and the Earth from extraterrestrial living pollution.
," Xu said.
April, the International Space Station will face an astronaut rotation, and NASA is taking strict steps to prevent the new coronavirus from entering the station.
Two Russian and one American astronauts will fly to the International Space Station on April 9, according to NASA.
the three astronauts undergo specific "healthy stabilization" steps, including a two-week quarantine period, before they enter space.
NASA has taken "enhanced" security measures to minimize the number of staff involved in rocket launches and return capsule recovery, and all staff in contact with astronauts must first undergo strict medical isolation.
NASA medical staff eras, Bazmanova, said space agencies have been working to prevent any virus from entering the International Space Station, "given the enhanced security measures, the possibility of the new coronavirus entering the International Space Station is very remote."
"Source: Xinhua News Agency, Science and Technology Daily.