Breaking News
Get Actionable Insights with InvestingPro+: Start 7 Day FREE Trial Register here
Investing Pro 0
Ad-Free Version. Upgrade your Investing.com experience. Save up to 40% More details

COVID-19 reinfection less likely to be severe; cardiac stress test useful for unexplained lingering breathlessness

Stock MarketsNov 29, 2021 06:41PM ET
Saved. See Saved Items.
This article has already been saved in your Saved Items
 
2/2 © Reuters. A healthcare worker collects a coronavirus disease (COVID-19) test swab sample from a woman at the Indira Gandhi International Airport in New Delhi, India, November 29, 2021. REUTERS/Anushree Fadnavis 2/2

By Nancy Lapid

(Reuters) - The following is a summary of some recent studies on COVID-19. They include research that warrants further study to corroborate the findings and that has yet to be certified by peer review.

Coronavirus reinfections rarely severe

Reinfections with the virus that causes COVID-19 are rarely severe, new findings suggest. Researchers in Qatar compared 1,304 individuals with a second SARS-CoV-2 infection with 6,520 people infected with the virus for the first time. The odds of developing severe disease were 88% lower for people with second infections, the researchers reported online on Wednesday in The New England Journal of Medicine. Reinfected patients were 90% less likely to be hospitalized compared to patients infected for the first time, and no one in the study with a second infection required intensive care or died from COVID-19, said Dr. Laith Jamal Abu-Raddad of Weill Cornell Medicine-Qatar in Doha. "Nearly all reinfections were mild, perhaps because of immune memory that prevented deterioration of the infection to more severe outcomes," he said. The risk for severe illness in people who had been infected before was only about 1% of the risk associated with initial COVID-19 infections, the researchers estimated. For half of those with a second infection, the first infection had occurred more than nine months earlier. It is not clear how long immune protection against severe reinfection would last, the researchers noted. If it does last for a long time, they speculate, it might mean that as the coronavirus becomes endemic, infections could become "more benign."

Cardiac stress test useful for lingering breathlessness

In COVID-19 survivors struggling with lingering shortness of breath for which doctors do not have an explanation, cardiac stress testing may help identify the cause of the problem, researchers say. "The current clinical guidelines do not recommend cardiopulmonary exercise testing out of concern that this test could worsen the patients' symptoms. However, we found that cardiopulmonary exercise testing was able to identify reduced exercise capacity in about 45% of patients," said Dr. Donna Mancini of the Icahn School of Medicine at Mount Sinai in New York. The 18 men and 23 women in the study all had persistent shortness of breath for more than three months after recovering from COVID-19, according to a report published on Monday in Journal of the American College of Cardiology: Heart Failure. They had normal-looking results on lung function tests, chest X-rays, chest CT scans and echocardiograms. The exercise tests revealed problems that would otherwise have been missed, Mancini said. "Low level functional testing recommended by the guidelines, such as a 6-minute walk test, would not be able to detect these abnormalities," she said.

Experimental smartwatch COVID-19 detection improving

Smartwatch alerting systems for early detection of COVID-19 infection are coming closer to reality, researchers reported on Monday in Nature Medicine. They tested their new system, developed with open-source software, in 2,155 wearers of Fitbit (NYSE:FIT), Apple (NASDAQ:AAPL) Watch, Garmin (NASDAQ:GRMN) watches or other devices. Ultimately, 84 of the volunteers were diagnosed with coronavirus infections - including 14 of 18 people without symptoms. Overall, the researchers' algorithms generated alerts in 67 (80%) of the infected individuals, on average three days before symptoms began. "This is the first time, to our knowledge, that asymptomatic detection has been shown for COVID-19," they said. Presently, the system mainly depends on measurements of wearers' resting heart rate, said study leader Michael Snyder of Stanford University School of Medicine in California. Going forward, he said he hopes watch manufacturers will be able to provide other types of highly accurate physiologic data. "Many stressors can trigger the alerting," Snyder said. "Most of these are easy to spot - travel, excessive alcohol, even work or other types of stress, so the user knows to ignore the alerts." When watches can report other health data such as heart rate variability, respiration rate, skin temperature, and oxygen levels, it will become easier to distinguish the COVID-19 cases from other non-COVID-19 events, researchers said. "Right now we are running this as a research study," Snyder said. "But soon we hope that FDA approved devices will dominate this area."

Vaccines in development: https://graphics.reuters.com/HEALTH-CORONAVIRUS/VACCINE-TRACKER/xegpbqnlovq/

COVID-19 reinfection less likely to be severe; cardiac stress test useful for unexplained lingering breathlessness
 

Related Articles

Add a Comment

Comment Guidelines

We encourage you to use comments to engage with other users, share your perspective and ask questions of authors and each other. However, in order to maintain the high level of discourse we’ve all come to value and expect, please keep the following criteria in mind:  

  •            Enrich the conversation, don’t trash it.

  •           Stay focused and on track. Only post material that’s relevant to the topic being discussed. 

  •           Be respectful. Even negative opinions can be framed positively and diplomatically. Avoid profanity, slander or personal attacks directed at an author or another user. Racism, sexism and other forms of discrimination will not be tolerated.

  • Use standard writing style. Include punctuation and upper and lower cases. Comments that are written in all caps and contain excessive use of symbols will be removed.
  • NOTE: Spam and/or promotional messages and comments containing links will be removed. Phone numbers, email addresses, links to personal or business websites, Skype/Telegram/WhatsApp etc. addresses (including links to groups) will also be removed; self-promotional material or business-related solicitations or PR (ie, contact me for signals/advice etc.), and/or any other comment that contains personal contact specifcs or advertising will be removed as well. In addition, any of the above-mentioned violations may result in suspension of your account.
  • Doxxing. We do not allow any sharing of private or personal contact or other information about any individual or organization. This will result in immediate suspension of the commentor and his or her account.
  • Don’t monopolize the conversation. We appreciate passion and conviction, but we also strongly believe in giving everyone a chance to air their point of view. Therefore, in addition to civil interaction, we expect commenters to offer their opinions succinctly and thoughtfully, but not so repeatedly that others are annoyed or offended. If we receive complaints about individuals who take over a thread or forum, we reserve the right to ban them from the site, without recourse.
  • Only English comments will be allowed.

Perpetrators of spam or abuse will be deleted from the site and prohibited from future registration at Investing.com’s discretion.

Write your thoughts here
 
Are you sure you want to delete this chart?
 
Post
Post also to:
 
Replace the attached chart with a new chart ?
1000
Your ability to comment is currently suspended due to negative user reports. Your status will be reviewed by our moderators.
Please wait a minute before you try to comment again.
Thanks for your comment. Please note that all comments are pending until approved by our moderators. It may therefore take some time before it appears on our website.
Comments (1)
Felipe Daniel
Felipe Daniel Nov 29, 2021 8:42PM ET
Saved. See Saved Items.
This comment has already been saved in your Saved Items
No boosters needed in conclusion
 
Are you sure you want to delete this chart?
 
Post
 
Replace the attached chart with a new chart ?
1000
Your ability to comment is currently suspended due to negative user reports. Your status will be reviewed by our moderators.
Please wait a minute before you try to comment again.
Add Chart to Comment
Confirm Block

Are you sure you want to block %USER_NAME%?

By doing so, you and %USER_NAME% will not be able to see any of each other's Investing.com's posts.

%USER_NAME% was successfully added to your Block List

Since you’ve just unblocked this person, you must wait 48 hours before renewing the block.

Report this comment

I feel that this comment is:

Comment flagged

Thank You!

Your report has been sent to our moderators for review
Disclaimer: Fusion Media would like to remind you that the data contained in this website is not necessarily real-time nor accurate. All CFDs (stocks, indexes, futures) and Forex prices are not provided by exchanges but rather by market makers, and so prices may not be accurate and may differ from the actual market price, meaning prices are indicative and not appropriate for trading purposes. Therefore Fusion Media doesn`t bear any responsibility for any trading losses you might incur as a result of using this data.

Fusion Media or anyone involved with Fusion Media will not accept any liability for loss or damage as a result of reliance on the information including data, quotes, charts and buy/sell signals contained within this website. Please be fully informed regarding the risks and costs associated with trading the financial markets, it is one of the riskiest investment forms possible.
Continue with Google
or
Sign up with Email