Nobodys risk is zero when it comes to the Covid-19 coronavirus.
Anybody can get sick in this pandemic. But different people have different risks of getting severe symptoms that require hospitalization or intensive care and the chances of dying from Covid-19 vary widely across age groups.
The conventional wisdom says kids and young people may be fine even if they get infected, with the risk of a case being more severe increasing with age. Its the older folks, we need to worry about, this thinking says, given death rates reach 20 percent or more among people 80 and older. Public health experts have seemed exasperated by the social media images of younger Americans who continue to socialize or even take a spring break vacation, worried that the perception a young person has little to fear from the coronavirus has given them a false sense of security.
To be clear, nobody should feel invulnerable to the coronavirus. Young people are going to contract the disease, a not-insignificant percentage of them are going to get very sick, and a smaller number will die. The rates of severe and deadly cases might not be nearly as high as the older generations that we are worried about, but the data already show that age alone does not make you invincible.
There are two other things about risk to keep in mind about whos at higher risk. One, there is some indication that men could be at a higher risk of severe symptoms and death than women. In the initial Wuhan, China, outbreak, for example, men were dying at a notably higher rate than women. Weve seen the same trend in Italy. But we will need more research and data to be sure about the effect of gender on a patients prognosis.
Second, we know that people who have underlying medical conditions face higher odds of getting really sick or dying from Covid-19, particularly those with heart disease, diabetes, high blood pressure, lung disease, and cancer. Having one or more of those conditions increases a persons risk of severe symptoms beyond what their age alone would suggest.
To review everything we know on age and the Covid-19 risk, Im going to draw from a few sources that well keep coming back to: the World Health Organization report on the initial Wuhan outbreak, the Centers for Disease Control and Preventions new report on the early cases in the US, Spains breakdown of its pandemic by age group, and two Vox articles on the risks to children and older people.
One caveat: Overall infection rates increase with age (kids seeing lower infection rates, seniors higher). But its hard to know if thats because young people actually get infected less or simply because they are less likely to develop serious symptoms and seek medical attention, and so their cases are being underreported. A second caveat: The data we have so far are preliminary, and what we know will change as more information from different countries outbreaks come in.
Well therefore stick to the data we have both good numerators and denominators for to answer an important question: What are your risks if you do get infected with the coronavirus?
Now lets run through the different age groups and what we know about their risks.
The important stats on our youngest:
So far, the data does bear out the idea that kids are not uniquely at risk of Covid-19, which is both surprising (because they usually are more vulnerable to the flu) and a relief.
But this age group obviously covers everybody from infants to kids approaching middle school. And we do have evidence that the youngest of these can see more severe cases than their older brothers and sisters in elementary school, as Voxs Umair Irfan reported:
A study published March 16 in the journal Pediatrics of more than 2,100 children in China found that children of all ages were vulnerable to Covid-19, though the vast majority experienced mild symptoms, and some experienced none at all. A caveat for this study is that only one-third of the children in the sample were tested and confirmed to have the Covid-19 virus, SARS-CoV-2. The rest were presumptive Covid-19 cases, which means theres a possibility that another pathogen could have caused the observed symptoms.
Zeichner, who co-authored a commentary article about the findings, noted that the worst outcomes in children were often among infants. The study showed that about 30 percent of childhood Covid-19 cases deemed severe and more than half of Covid-19 cases deemed critical were among children less than 1 year old. Though the overall numbers were small 7 infants had critical illness and 33 suffered severe illness it did show that younger children faced a higher likelihood of more dangerous outcomes.
The other complication is that these younger people could still spread the disease to older generations, who are more at risk of critical illness.
Bottom line: Infants appear more vulnerable than toddlers and elementary school kids. Overall, though, only a small number of children under 10 years old are requiring hospitalization because of Covid-19 and, as of March 21, nobody in this age group has died.
The important stats on adolescents and just-turned-adults:
With the younger generations, same as the older generations, underlying medical conditions add to a persons vulnerability. But the absence of health problems does not mean the absence of risk: CNN reported Sunday on a 12-year-old girl in Atlanta with Covid-19 who has no known health conditions and who is nevertheless on a ventilator.
Bottom line: Older kids and teenagers may be more resilient than their younger peers in some ways (lower hospitalization and ICU rates in Spain, the only country we have data to separate the 0-9 and 10-19 cohorts), but there is still a small risk of serious complications or death.
The important stats on young adults:
Bottom line: We are seeing a higher hospitalization rate among young adults compared to the teens directly behind them in age, and comparatively more of them wind up in the ICU. Fatality rates are still low, but deaths do happen. The trends that will carry through the rest of this article the older you get, the higher the risk are starting to show up.
The important stats on this working-age population:
To prevent these numbers from becoming too abstract, the story of Jeffrey Ghazarian is a sad warning for this population. Ghazarian, a 34-year-old who lived near Los Angeles, died Thursday from Covid-19 after five days on a ventilator. He was a cancer survivor, which fits with what we know about the disease: People with past health problems and compromised immune systems are more at risk.
Bottom line: For this demographic, a significant number of people are being hospitalized, upward of one in five cases. And those final numbers from the CDC are a good example of how risk can vary within these age groups: Odds of hospitalization, intensive care, and death seem to increase from ones early 40s to late 40s. Weve seen the same trend in Spain: The rates of hospitalization jumped from 17 percent for ages 30 to 39 to 23 percent for ages 40 to 49.
The important stats on the people entering their golden years:
For folks over 50, the risks steadily grow, both due to their age and because they are more likely to have a preexisting medical condition that exacerbates their risk. Almost half of Americans ages 55 to 64 have at least one preexisting condition, according to the Kaiser Family Foundation.
Thats a problem when an unknown pathogen strikes. More from Voxs Brian Resnick:
The longer we live, the more likely our cells are to replicate in dangerous ways, the more damage they accumulate, and the more likely our organs are to stop functioning normally. This puts us at a heightened risk of chronic health conditions, like cancer or diabetes. Along with already weakened immune systems, these underlying diseases can make it harder for the body to ward off infections. The takeaway: Its not just age alone that endangers people; its being older with one or more chronic diseases.
Among the 105 patients who had died in Italy as of March 4, two-thirds had three or more preexisting conditions. The most common was hypertension, followed by ischemic heart disease and diabetes mellitus. These chronic illnesses can leave organs degraded and more vulnerable to infection. Additionally, the treatments for these conditions can suppress the immune system, leaving the body susceptible to pathogens.
Bottom line: All of these folks are in the high-risk category. A substantial minority are being hospitalized, and a handful of people out of every 100 have died. The dangers increase if they have heart or lung problems, or if they have diabetes or a cancer diagnosis.
The important stats on older individuals:
One note: The ICU stays could be lower for the oldest people if the disease progresses so quickly that they dont even have an opportunity for intensive care.
Bottom line: There is no need to belabor the point, as I think one thing most people know about Covid-19 is it hurts older people the most. The data bears this out: People in this age group are the most likely to be hospitalized and to ultimately die during this pandemic.
For the rest of us, the risk is less severe but far from zero, and every person should be mindful of how their current health might make them more susceptible. And all of us, no matter our age or health status, should do our part to protect the most vulnerable through social distancing.
Read the original here:
Coronavirus deaths and severe cases by age: What we know - Vox.com
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