Catching COVID-19 on a train is just as likely whether you’re sitting or standing, study says

Catching COVID-19 on a train is just as likely whether you’re sitting or standing, study says
Catching COVID-19 on a train is just as likely whether you’re sitting or standing, study says

Catching coronavirus while practicing is just as likely if you’re sitting or standing, a study has found.

Mathematicians have modeled how airborne illnesses like COVID-19 develop to the size of a practice car without an efficient airflow system.

The crew, from the University of Cambridge and Imperial College London, found there is no “safer place” for passengers to minimize the chance of transmission.

Air movement is slower during practice, so any infectious passengers will affect the most people if they are there instead of at one end.

However, in reality, passengers will not know who is infected or where they are within the practice, so the risk of infection is taken care of wherever you are standing or sitting.

The researchers also found that masks are more practical than social distancing in reducing transmission, especially on trains that aren’t ventilated with fresh air.

They hope to provide more detailed models in the future to get a better idea of ​​how airborne pollutants spread in enclosed areas.

These results come amid the biggest rail strike in the UK in 30 years, coupled with a 40 per cent rise in COVID cases since last week.

The Model Found That Air Movement Is Slowest In The Middle Of The Train, So Any Infectious Passengers Will Affect The Most People If They Stand There Rather Than At One End.

The model found that air movement is slower during practice, so any infectious passenger will affect the most people if it’s there rather than at one end.

HOW CAN YOU REDUCE YOUR RISK OF COVID INFECTION WHILE ON A TRAIN?

  1. Social distancing of different passengers when the car is less than 50% full
  2. Stay away from seats in the center of the carriage where air movement is slowest when more than 50% full
  3. Put on high-quality masks while traveling

First writer Rick de Kreij said, “In order to improve airflow methods, it is important to understand how airborne diseases develop in certain situations, but most models are very fundamental and may not make good predictions.

‘Most of the simple models assume that the air is absolutely mixed, but that is not how it works in real life.

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“There are a lot of factors that could have an effect on the chance of transmission in a practice: whether people inside the practice are vaccinated or not, whether they wear masks or not, how crowded it is, etc.

“Any of those elements can change the probability level, so we looked at relative danger, not absolute danger — it’s a toolbox that we hope will give people an idea of ​​the types of danger of a disease transmitted by the virus. air in public transport. ‘

The results, published today in Indoor Air, show how important it is for operators in the practice to improve their airflow techniques to keep passengers safe.

Many commuter trains within the UK are designed to have the widest possible variety of seats per carriage, to generate the most revenue for each journey you make.

Also, most commuter trains recirculate air instead of drawing fresh air from outside, as fresh air must be heated or cooled, which is more expensive.

Hitachi Class 802 Train Interior, Including Hvac Inlet (Orange) And Hvac Outlet (Green).  Arrows Indicate The Direction Of Flow At The Inlets And Outlets.  A: Center View, B: Side View

Hitachi Practice Class 802 interior, along with HVAC input (orange) and HVAC output (green). The arrows indicate the route of circulation in the coves and stores. A: center view, B: side view

The mathematicians developed a model that illustrates how airborne pollutants travel in a practice car that considers only the important atmospheric physics.

It is mainly based on a single practice car with doors that close at both ends, although it can be adapted to various types of trains and even planes or buses.

The model was validated by a controlled experiment where CO2 levels were measured at various points in an actual practice car, yielding similar results.

The researchers found that air movement is slower in the middle of a training car.

“If an infectious person is in the path of the carriage, then they are more likely to infect people than if they were standing at the end of the carriage,” de Kreij said.

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“However, in a real situation, people don’t know where an infectious person is, so the risk of infection is fixed regardless of where they are in the carriage.”

Continuing To Social Distance While Traveling By Train Is A Must When The Carriage Is At Least 50 Percent Empty, According To De Kreij.

Persevering in social distancing when riding in a practice is a must when the car is at least 50 percent empty, according to de Kreij.

The Researchers Also Found That Masks Are More Effective Than Social Distancing In Reducing Transmission, Especially On Trains That Aren'T Ventilated With Fresh Air.

The researchers also found that masks are more practical than social distancing in reducing transmission, especially on trains that aren’t ventilated with fresh air.

This confirms that correct airflow is important in reducing the transmission of COVID-19 and other respiratory infections such as influenza.

Persevering in social distancing when riding in practice is a must when the car is at least 50 percent empty, according to de Kreij.

He said: ‘Get out as much as you can – physical distancing is not the best method, but it works when capacity levels are below 50 per cent

“And wear high-quality masks, which will not only protect you from COVID-19, but also from other common respiratory illnesses.”

If the car is more than half full, the researchers recommend that the high-risk middle seats be blocked off.

The researchers are currently trying to extend their preliminary model to account for other physical elements that will affect the spread of contaminants in a practice.

This could include dividing the car into different zones and estimating the cross flow of each, or the presence of giant droplets or objects that are likely to transmit infection.

You can also look at thermal stratification, when two types of steam with different temperatures form two separate layers after coming into contact.

This phenomenon can lead to an additional layer of contaminated air being placed in the passengers’ breathing zone.

Covid cases increase 40 percent every week in England with 1.1 million infected

Covid cases rose by 40 per cent in England last week, in what is feared to be the start of a new wave of the virus, according to Work for Nationwide Statistics (ONS).

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An estimated 1.13 million people were infected on a given day within the week ending June 10, the equivalent of 1 in 50 inhabitants.

It marks the biggest weekly rebound since December, when Omicron was seeded for the first time in the nation.

Cases are also rising in Wales and Northern Ireland (one in 45 had the virus last week) and Scotland (one in 30).

The ONS’s weekly survey of infections has become one of the best barometers of the outbreak in the post-pandemic period after free tests were removed and the daily dashboard was reduced.

The data suggests that the resurgence is being driven by Omicron’s BA.4 and BA.5 subvariants, which are considered much more infectious than parental pressure.

Scientists also believe that the Queen’s Platinum Jubilee celebrations could have fueled the rally.

Covid Cases Rose 40 Percent In England Last Week In What Is Feared To Be The Start Of A New Wave Of The Virus, Official Figures Show.  The Office For National Statistics (Ons) Estimates That 1.13 Million People Were Infected On Any Given Day Of The Week Ending June 10, The Equivalent Of One In 50 Of The Population.  That Figure Is 42 Percent Higher Than The Previous Week.

Covid cases rose by 40 percent in England last week in what is feared to be the start of a new wave of the virus, according to official figures. The Office for National Statistics (ONS) estimates that 1.13 million people were infected on a given day within the week ending June 10, the equivalent of 1 in 50 inhabitants. That figure is up 42 percent from the previous week.

How The Dominant Covid Variants In England Have Changed Over Time: Ba.4 And Ba.5 (Shown Far Right In Pale Pink And Red) Are On The Rise And Taking Over From The Ba.2 Variant Currently Dominant (Sky Blue).  The Original Wuhan Virus Is Shown In Green (Far Left) Which Was Replaced By The Alpha (Purple) And Delta (Pale Turquoise) Strain.  The Original Omicron Is Shown In Yellow And A Very Similar Sub-Variant In December Pink.

How the dominant Covid variants in England have changed over time: BA.4 and BA.5 (tested very well in pale pink and pink) are emerging and replacing the currently dominant BA.2 variant (sky blue). The original virus from Wuhan is shown in green (far left) which was changed to the Alpha (purple) and Delta (pale turquoise) axis. The original Omicron is shown in yellow and a closely related sub-variant in pink as of December.