New studies have shown that the new Coronavirus can survive for hours to days on various surfaces. Read the article to find out if you can get infected by touching such surfaces
A new coronavirus resulting in pneumonia-like symptoms began making the headlines in late 2019. Since it first emerged in China, this virus has spread to almost all countries in the world and has resulted in the death of thousands of humans. The virus was later named SARS-CoV-2, (Severe Acute Respiratory Syndrome CoronaVirus 2), and the illness caused by the virus is called COVID-19 (COronaVIrus Disease - 2019).
SARS-CoV-2 spreads from a person to another, which is mainly through respiratory droplets produced when an infected person coughs or sneezes near you. Viruses present in these droplets can enter your nose, mouth, or eyes, and infect you.
You can also get infected if you touch your nose, mouth, or eyes when your hands are contaminated by touching a surface or object that has droplets with the virus on it. This is not considered to be the primary way this virus spreads, but there are pretty good chances that you might get infected through such indirect contact.
When an infected person sneezes or coughs into their hands and touches objects without washing their hands, the virus gets transferred to such objects. When you touch such objects and touch your face or mouth, the virus can enter the body. This is why doctors are asking us not to touch our face, nose, or mouth with unwashed hands.
Recent studies have shown that the new coronavirus can survive for hours to days on various surfaces such as doorknobs, tabletops, etc. This survival rate varies depending on the material the contaminated surface is made of. These studies and researches are still at the preliminary level, but they still give a lot of useful information about the new coronavirus. They provide information on how long SARS-CoV-2 can live on the surfaces you come in contact with every day.
According to a study from the National Institutes of Health and published in The New England Journal of Medicine (NEJM), this virus remains stable for hours to days on surfaces and in the air.
The study was conducted after depositing the virus from an infected person on surfaces that people touch commonly. They then noted the duration of the virus remains infectious on those surfaces. SARS-CoV-2 was detectable and infectious in the air for almost 3 hours and up to 2 to 3 days on plastic and steel.
The Lancet published a second study, where a droplet containing a determined number of viruses was introduced onto a surface. The results of these studies have provided crucial information about the stability of this virus and suggested that people may get infected through the air and by touching contaminated objects.
According to the Centers for Disease Control and Prevention (CDC), the virus was found on various surfaces on the Diamond Princess cruise ship up to 17 days after the passengers disembarked. The virus was found in the cabins of both asymptomatic and symptomatic passengers infected with COVID-19.
SARS-CoV-2 is said to last longer on smooth and shiny surfaces like metal and plastic. Surfaces that are uneven and have a lot of holes are not favorable.
The following information is based on studies conducted in controlled labs. The effects of environment and other conditions on the viability of viruses present on such surfaces are not known.
We are literally surrounded by plastic. Almost everything we use has plastic in it. This includes our food packages, water bottles, credit cards, milk cartons, remote controls, keyboards, ATM buttons, elevator buttons, light switches, toys, etc.
The NEJM study detected the virus on plastic surfaces for up to 3 days, while the other study showed them to last longer (up to 7 days).
Metals like stainless steel and copper are used in various objects like doorknobs, refrigerators, spoons, pots, keys, jewelry, electrical wires, coins, etc.
The NEJM article found no virus on copper surfaces after 4 hours itself, and the Lancet article detected viruses on surfaces made from stainless steel for up to a week. But, the NEJM article states that no viable virus was found on stainless steel surfaces after 3 days (72 hours).
Windows, computer screens, eyewear, mirrors, smartphones, etc., are some of the most commonly used objects made from glass.
The virus was found on glass surfaces for up to 4 days, according to the Lancet study.
Paper is used in money, letters, magazines, newspapers, toilet papers, tissues, etc.
According to the Lancet study, no viable virus was found on tissue paper and newspaper after 3 hours, while the virus was detected on currency notes for almost up to 4 days.
Most of our furniture, such as tabletop, doors, shelves, cupboards, etc., are made of wood. The Lancet study found viable viruses on wood surfaces for 2 days.
Couriers, food packages, toy boxes, etc., are made from cardboard. According to the NEJM study, the virus can remain viable on cardboard for 24 hours.
7) Clothes and Shoes:
The study published in the Lancet article states that the virus is viable for 48 hours (2 days) on clothes. And the majority of samples collected from the shoes of hospital staff caring for COVID-19 patients showed the virus to be present on them.
8) Food and Water:
SARS-CoV-2 is not known to spread from food and water. All the species of coronaviruses do not do well in food. But, the packages in which the food comes in might still be contaminated.
These numbers will be affected by factors like temperature and humidity. In higher temperatures and humidity levels, the virus survived for a shorter time (CDC).
Make sure you clean and disinfect all high-touch surfaces. These include doorknobs, all handles, switches, taps and faucets, toilets, staircase railings, keyboards, and phones. Clean these surfaces while wearing a disposable mask and gloves. In case you are not using gloves, wash your hands immediately after you clean these surfaces.
Floors and Other Surfaces:
CDC recommends using EPA-registered disinfectants or household bleach solutions. To make a bleach solution:
Mix 5 tablespoons of bleach in a gallon of room temperature water.
Mix 4 tablespoons of bleach in 4 cups of room temperature water.
And for cleaning electronics and smartphones, alcohol-based wipes or alcohol sprays (70 % Ethanol) can be used.
Wash your clothes with regular detergent in the warmest washing machine setting. If you are washing them with your hands, wear a mask and gloves. Let the clothes dry properly under the sun or in the dryer.
The data presented in this article are based on studies there were conducted in a lab. In the real world, even if any surface has SARS-CoV-19 on them, it does not mean that you will definitely get infected. As this virus is extremely sensitive to environmental conditions like heat and humidity, the virus can lose its stability fast. So the number of viruses present on the surface will keep reducing with time.
You are more likely to get infected directly from an infected person than such contaminated objects. There is a lot more to learn about this virus, so wash your hands, keep distance, and stay healthy!
SARS was more dangerous than COVID-19. However, it is less infectious than COVID-19. Since 2003, No worldwide outbreaks of SARS have been reported.
SARS-CoV-2 is a newly developed virus that caused the pandemic in March 2020. Whereas, SARS-CoV caused the 2002-2003 outbreak. The incubation period for SARS ( 2 to 10 days) is less when compared with that of COVID‐19 (1 to 14 days).
COVID-19 and SARS belong to the same family of Coronaviruses that cause severe respiratory infections. But they are genetically different. SARS shares almost 80% of the genes with COVID but it also contains some additional genes.
If the test report shows positive means, the SARS-CoV-2 virus is detected in the test sample and COVID infection is present. Proper isolation and precautions should be followed. A medical professional or healthcare provider must be consulted.
SARS infection shows good recovery but it depends on the extent to which the infection has spread. Mild symptoms recover on complete rest at home. But in severe conditions, emergency care is needed and a doctor should be consulted. There are no specific medications for SARS. Symptomatic treatment with antibiotics, fluids, and adequate rest helps to recover better.
The risk of getting the SARS infection is high in individuals who are in close contact with SARS patients and in people who have recently visited fever wards (isolation wards where SARS patients are kept separated for observation). People who often eat outside their homes and who frequently use public transport have a greater chance of getting a SARS infection.
The SARS-CoV-2 virus enters through the nose or mouth and reaches the cells in the lungs. The immune system in the body releases immune mediators (anti-viral interferon) to destroy the virus. But these SARS-CoV-2 viruses neutralize the interferon responses and escape the innate immune cells due to uncontrolled virus replication.
Antibodies specific to SARS (virus-specific IgG) are produced in the body as a delayed response. But they are essential to neutralize the virus and prevent future infection. IgG antibodies against SARS-CoV persist for a period of at least 12 years and provide immunity against SARS infection. But their levels get reduced in patients who are treated with corticosteroids during the time of infection.
SARS-CoV-2 is a newly emerged coronavirus that caused the coronavirus pandemic outbreak in 2019. It is a single-stranded RNA virus. This virus is highly unstable and frequently undergoes genetic changes resulting in new variants.
No, SARS-COV-2 and common cold viruses are different viruses. SARS-COV-2 is a coronavirus whereas the common cold is caused by influenza or rhinoviruses. But all these viruses are transmitted in the same manner and cause similar symptoms.
Last reviewed at:
06 Jan 2022 - 5 min read
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