Source: Arabic.Net – Jamal Nazi
Six months after the outbreak of the newly borne Coronavirus, a pivotal question is how is infection exactly occurring and how can it be avoided?
To answer this question, the American Wall Street Journal published a report saying that many scientific studies have found that it is rare for an infection to come in contact with contaminated surfaces, and it is not likely that the infection will spread due to transitory encounters between people in open places.
The main sources of risk
But the report highlights that the main cause of spread of infection is close personal interactions for long periods, in addition to being on crowded occasions in closed places or poorly ventilated areas, which usually includes people speaking loudly or chanting chants or songs, which increases the risks in Places like gyms, musical or theatrical performances, conferences, weddings and birthday parties.
Tips for safe coexistence
The results of new scientific studies help companies and governments devise strategies to return to traditional life activities and reopen service and business centers while ensuring public health protection. This includes tactics such as installing transparent glass or plastic barriers, requiring wearing of masks and maintaining physical spacing in stores and government, public and other closed spaces, while ensuring the safety of good ventilation systems in installations and the need to keep windows open whenever possible.
Tom Frieden, CEO of Resolve to Save Lives, a nonprofit initiative whose purpose is to preserve and protect public health, explains: “Several ways to increase awareness and commitment to physical distance must be considered, allowing for the return of life activities, work and production without re-infecting the infection again.” .
Precautionary measures for coexistence
Recommendations to start coexistence with the pandemic include a set of measures, including continuing to conduct tests and exams on a large scale, with a mechanism in place to track any contacts with those found to be infected with immediate isolation of infected or exposed people.
And on top of the factors that cause transmission of infection some activities that may seem benign, such as exchanging conversations and breathing without masks among a crowd of people, which leads to splashes and droplets of different sizes and can spread through air currents and affect the people surrounding the infection.
Breath spray and aerosol
Respiratory droplets are still listed on the causes of Covid-19 infection, which have been identified by health authorities. These large liquid drops can transmit the virus from one person to another if they touch his eye, nose, or mouth. But the biggest chances are that it will fall to the ground or other surfaces very quickly.
Some researchers say that the Coruna virus can also be transmitted by aerosols, or small droplets that float in the air longer than large droplets. This aerosol can be inhaled directly.
The researchers add, in the results of their scientific study at the University of Hong Kong, that the virus, which flies during or during a patient’s breathing, can accumulate in air over time and a strong air flow from the air conditioning unit may help recycle particles in the air.
A member of the research team, Yogo Lee, a professor of engineering at the University of Hong Kong, recommends that providing adequate ventilation in places that many people and places of work frequent is very important. Appropriate ventilation elements include methods such as pushing air toward the ceiling and expelling it outside, or bringing fresh air into the rooms.
But Dr. John Brooks, senior physician at the American Center for Disease Control and Prevention (CDC), explains an important point regarding ventilation, explaining that infection with the Coronavirus is “mainly from infection with measles or tuberculosis, whose viruses remain stuck in the airspace for a long time.” Dr. Brooks cited the validity of this theory that if the corona virus was spreading strongly through large airspaces or through air handling systems, the numbers of infected people would have been much higher than they are currently.
Kisses and hugs also
Dr. Brooks says that communicating, speaking, standing or sitting at a distance of less than two meters and for more than 15 minutes without wearing a protective mask is what increases the risk of infection at high rates. Dr. Brooks has warned that it may take much less time if an infected sneezing occurs near other people’s faces or if an exchange of hugs or kisses occurs, for example.
The rates of infection of couples
Jimmy Lloyd-Smith, professor of ecology for infectious diseases at the University of California, explains that the results of a recent study in Wellcome Open Research indicates that an estimated 10% of people with Covid-19 have caused about 80% of infections.
According to the results of several studies, the rate of mass outbreak of Covid-19 infection in families ranges between 4.6% and 19.3%.
A Chinese study showed that transmission rates in families are higher among spouses, at 27.8%, compared to the rest of the other family members, by 17.3%. But in cases of strict adherence to the precautionary measures, everyone, including those in contact with a 19-year-old with COFED, survives.
In factories and companies
The CDC Center Guidelines list for employers, who reopen their facilities to receive employees and workers by requiring that protective masks are imposed on everyone, limiting the use of public transport and elevators, prohibiting hugging, shaking hands, and spacing more than twice and not talking for more than 15 minutes closely. The list includes a recommendation to companies that provide common snacks to their workers and spread water coolers or coffee machines in their corridors that use of dishes, cutlery and plastic cups for one time.
A medical advisory committee at a pharmaceutical company also issued recommendations that include the need for workers in factories to wear multiple layers of personal protection, including gloves, masks, protective masks or goggles and aprons that cover the entire body (jumpsuits). Recommendations included good ventilation, continuous cleaning, frequent sterilization of rest rooms, changing clothes, security checkpoints, elevators, cafeterias, and toilets while adhering to the presence of a few numbers at the same time and managing appropriate spaces to ensure physical distance.