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How to assess your COVID risk before leaving – Don’t eat it

Conflict counseling by public health authorities has been a frustrating (if understandable) factor since the first day of the COVID-19 epidemic, so it is important to understand risk assessment in everyday life. “Since we are at the stage of ‘assessing your own risk’ of this epidemic, it may be helpful if public health officials give a master class to assess risk. Instead, it seems that educators and engineers need to do this.” Says a professional engineer Joseph Fox, P.Eng., MASc. “To assess the risk of the place, you first need to know how you are infected and what contributes to it.” According to experts, here’s how to assess your COVID-19 risk. Read on to find out more – and to ensure your health and the health of others, don’t miss out Already have COVID? These symptoms “never go away”.

The waiter coughs on his elbow while serving customers at the restaurant.

“The primary way you get infected with COVID is to breathe an infectious dose over a certain period of time,” says Fox. “Dose is defined by 4 factors: dose = virus concentration x time x respiratory rate x respiratory rate. The dose is related to the probability of infection. You may be less likely to be infected (like outdoors), it’s just less likely. That’s why something is ‘safe’.” Reducing the dose reduces the risk of infection, but does not eliminate the risk. “

Women with mask on face

“Time: The more time you spend on a particular concentration, the greater the risk,” says Fox. “For activities that do not require spending extended periods of time, such as going to the store, reducing the risk is an effective measure.”

People wearing a surgical mask sitting on a subway in Shanghai

“Respiratory Rate: For some reason the ‘hold your breath’ method is not publicized enough. When the respiratory rate is 0, you are not infected with inhalation,” Fox jokes. “The faster you breathe, the more air you breathe in a certain period of time. If you combine the amount of time and breathing, the risk is related to the number of breaths you take. More breaths mean greater risk.”


“Deposit Rate: Many of the virus particles you breathe don’t stay inside you, you just breathe them back in,” says Fox. However, I think it is not advisable to assess the risk. One possible exception is that you have a natural immunity and it can remove the deposited particles rather than infect you. Low humidity inhibits this and increases the risk of storage. “

The sick young woman lay in her bed.

“Virus density: The final and most complex factor,” Fox explains. “The higher the concentration you breathe, the fewer breaths you need to reach the infectious dose. So how do you determine the density of the virus? Tier – When you leave early, you have a concentrated air jet in front of you (think of a smoker’s breath). However, the higher the air you breathe in the lower range, the more air is actually out of the room, so the lower virus concentration in the rest of the room makes a difference – even in the lower range, which affects the final virus concentration There are many factors and they are important for assessing risk. ”


Follow the basics of public health and help end this epidemic, wherever you live — vaccinate or increase as soon as possible; If you live in an area with low vaccination rates, wear N95 Face MaskDon’t travel, avoid social crowds, overcrowding, don’t go home with people you don’t trust (especially in bars), practice good hand hygiene and save your life and the lives of others. 35 places you are more likely to catch Kovid.

The Firozan Mast

Ferozan Mast is a science, health and wellness writer with a passion for making science and research-supported information accessible to a general audience. Read More

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