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Here’s Why The CDC Recommends Wearing Masks Indoors Even If You’ve Been Fully Vaccinated Against COVID-19

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Here’s Why The CDC Recommends Wearing Masks Indoors Even If You’ve Been Fully Vaccinated Against COVID-19


Vaccinated people need to mask up again, according to the U.S. Centers for Disease Control and Prevention. On July 27, 2021, the CDC recommended that everyone in areas with high COVID-19 infection rates wear masks in public indoor spaces, regardless of vaccination status.

It’s a reversal from the CDC’s May 2021 advice that the fully vaccinated could leave their masks at home and brought U.S. guidelines more in line with World Health Organization recommendations.

The Conversation asked Peter Chin-Hong, a physician who specializes in infectious diseases at the University of California, San Francisco, to help put into context the science behind the changing messages.

What science supports masking after vaccination?

Masks help stop the spread of the coronavirus. They’re a literal layer between you and any virus in the air and can help prevent infection.

The reason public health officials are calling for more mask-wearing is that there is clear and mounting evidence that – though rarebreakthrough COVID-19 infections can occur in people who are fully vaccinated. This is particularly true with emerging variants of concern. The good news is that COVID-19 infection, if it does happen, is much less likely to lead to serious illness or death in vaccinated people.

Some conditions make a breakthrough infection more likely in a vaccinated person: more virus circulating in the community, lower vaccination rates and more highly transmissible variants.

If vaccinated people can get infected with the coronavirus, they can also spread it. Hence the CDC recommendation that vaccinated people remain masked in indoor public spaces to help stop viral transmission.

Where will the guidelines apply?

The CDC mask recommendation targets areas in the U.S. with more than 50 new infections per 100,000 residents or that had more than 8% of tests come back positive during the previous week. By the CDC’s own definitions “substantial” community transmission is 50 to 99 cases of infection per 100,000 people per week, and “high” is 100 or more.

Los Angeles County, for example, far surpassed that mark in mid-July, with more than 10,000 coronavirus cases per week.

Using these criteria, the CDC guidance applied to 63% of U.S. counties on the day it was announced. 

Who’s actually protected by masking recommendations?

The recommendation that fully vaccinated people continue wearing masks is primarily intended to protect the unvaccinated – which includes kids under age 12 who are not yet eligible for vaccines in the U.S. The CDC further recommends masking in public for vaccinated people with unvaccinated household members, regardless of local community transmission rates.

Unvaccinated people are at a substantially higher risk of getting infected with and transmitting SARS-CoV-2, and of developing complications from COVID-19.

How do new variants like delta change things?

Preliminary data suggests that the rise of variants like delta may increase the chance of breakthrough infections in people who received only their first vaccine dose. For instance, one study found that a single dose of the Pfizer vaccine had an effectiveness of just 34% against the delta variant, compared with 51% against the older alpha variant in terms of warding off symptomatic disease.

The data is more reassuring for those who have been fully vaccinated. After two doses, the Pfizer vaccine still provides strong protection against the delta variant, according to real-world data from Scotland and a variety of other countries; and in preliminary studies out of Canada and England, researchers noted only a “modest” decrease in effectiveness against symptomatic disease, from 93% for the alpha variant to 88% for delta.

Other recent preliminary reports from highly vaccinated countries like Israel and Singapore are sobering, however. Before the delta variant became widespread, from January to April 2021, Israel reported that the Pfizer vaccine was 97% effective in preventing symptomatic disease. Since June 20, 2021, with the delta variant circulating more widely, the Pfizer vaccine has been only 41% effective in preventing symptomatic disease, according to preliminary data reported by Israel’s Ministry of Health in late July. An analysis using government data from Singapore demonstrated that 75% of recent COVID-19 infections were in people who were at least partially vaccinated – though most of them were not severely ill.  

In all reports and studies, however, vaccines remain very good at preventing hospitalizations and severe disease due to the delta variant – arguably the outcomes we most care about.

All of this emerging data supports the WHO’s global recommendation that even fully vaccinated individuals continue to wear masks. Most of the world still has low vaccination rates and uses a range of vaccines with variable efficacies, and countries have different burdens of circulating SARS-CoV-2 virus.

With U.S. case counts and breakthrough infection numbers headed in what public health officials consider the wrong direction, it makes sense that the CDC would modify its masking recommendations to be more conservative.

What conditions in the US warrant masking up (again)?

It makes sense that the CDC didn’t immediately change its recommendations to fall in line with the WHO’s June guidelines. With an overall high countrywide vaccination rate and a low overall COVID-19 hospitalization and death burden, the U.S. has a COVID-19 landscape very different from that in most of the world.

Additionally, some experts worried that an official message that the vaccinated should don masks might dissuade unvaccinated individuals from seeking vaccines.

But as President Joe Biden put it on July 27, “new research and concerns about the delta variant” are behind the CDC’s change in masking recommendations.

Some locations are seeing further increase in community transmission, even among vaccinated people. New preliminary research yet to be peer reviewed suggests the delta variant is associated with a viral load a thousand times higher in patients than seen with older strains. And early reports show infected vaccinated people with the delta variant can carry just as high an amount of virus as the unvaccinated that they can in turn spread to others.

The shifting recommendations don’t mean that the old ones were wrong, necessarily, only that conditions have changed. The bottom line? Masks do help cut down on coronavirus transmission, but it’s still vaccines that offer the best protection. 

Peter Chin-Hong, Associate Dean for Regional Campuses, University of California, San Francisco

This article is republished from The Conversation under a Creative Commons license. Read the original article.





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Feeling Tired All The Time? Possible Causes And Solutions

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Long days of work, lack of sleep, and stress at the office can be the most common factors that make you feel tired. However, feeling “tired all the time” (TATT) without known reasons can be an indication of an underlying health issue that needs immediate attention.

Finding the exact cause of the lingering tiredness can be the first step toward solving the symptom.

Health conditions that cause fatigue:

1. Anemia – Anemia is one of the most common causes of fatigue. A person who has anemia does not have enough red blood cells in the body, causing symptoms such as tiredness, dizziness, feeling cold and crankiness.

Most often, anemia is caused by iron deficiency. Hence, the condition can be best resolved by including iron-rich foods in the diet and use of iron supplements.

2. Sleep Apnea – It causes the body to stop breathing momentarily during sleep. The condition can affect the quality of sleep and hence make you feel fatigued.

For milder cases of sleep apnea, lifestyle changes such as losing weight or quitting smoking can help solve the sleep disorder. In more severe cases where there is an obstruction in breathing, surgeries and therapies can help.

3. Diabetes – A person who has diabetes has changes in blood sugar level, which can cause fatigue. A patient who is already on diabetic medication can also experience tiredness as a side effect of the medication.

Early identification and taking the correct treatment is the key to managing diabetes. Losing extra weight and having a healthy diet also help in the treatment.

4. Thyroid – Thyroid diseases can be due to an overactive or an underactive thyroid gland. In people who have an underactive thyroid (hypothyroidism), the metabolism slows down leading to symptoms such as lethargy and fatigue. In people with an overactive thyroid (hyperthyroidism), the metabolism speeds up leading to fatigue and difficulty sleeping.

Right diet and lifestyle choices, along with medications, can help in thyroid management.

5. Infections – A person can show symptoms of fatigue when the body is fighting a viral or bacterial infection. Infections ranging from the flu to HIV can cause tiredness.

Along with fatigue, other symptoms such as fever, headache, body aches, shortness of breath and appetite loss can also accompany the infection. Treating the symptoms and taking adequate rest helps in faster recovery.

6. Food allergies – Fatigue may be an early warning sign of hidden food allergies and autoimmune disorders such as celiac disease. Identifying the allergen using a food allergy test or through an elimination diet can help in allergy treatment.

7. Heart disease – If you feel exhausted from an activity that used to be easy, then it is good to check your heart health, as fatigue can be an indication of underlying heart disease.

8. Depression/ anxiety – Fatigue can also be an indicator of a mental health disorder such as depression or anxiety. A combination of medication and psychotherapy can help relieve symptoms.

Lifestyle causes

Apart from serious health conditions, certain lifestyle habits such as dehydration, poor diet, stress and insufficient sleep can cause exhaustion. Having a well-balanced diet, regular exercise and routine sleep can help solve fatigue caused by lifestyle habits.

Published by Medicaldaily.com



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How To Overcome Your Sleep Debt And Reclaim Energy

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Picture this: you’re burning the midnight oil, studying or binge-watching your favorite shows, all at the expense of a good night’s sleep. Have you ever stopped to think about the toll it takes on your body and mind? The consequences can be more serious than you might realize.

Not getting enough sleep can translate into a multitude of issues, including weight gain, lack of focus, tiredness, a haze of confusion, and even depression. If you too are encountering similar issues lately then chances are you have a sleep debt.

Wondering what is sleep debt?

People from 13-18 years of age need 8 hours of sleep, whilst adults beyond that age will require at least 7 hours of snooze.

Sleep debt is a collection of the total hours you haven’t slept or traded your sleep for something else. Sleep debt keeps piling up as a person falls short of the total hours of sleep recommended for an adult, according to the Centers for Disease Control and Prevention.

And when you keep letting go of your sleep for other activities, the body adapts to the new normal and effects start to reflect on the energy levels, which deplete.

“However, like every other debt out there, this too has a repayment option,” Dr. Kunal Kumar, medical director of the Sleep Center at Einstein Medical Center in Philadelphia, told Livestrong.

Below are some expert-vetted ways you can pay back the sleep debt. (Courtesy: Livestrong and Sleepfoundation)

Just like financial debt, imagine sleep debt as a debt you owe to your body. It needs to be repaid. The good news is that catching up on sleep is indeed possible.

  • Maintain a set sleep schedule: Overhauling the sleep schedule is a pretty difficult task to achieve, and it’s best to do that gradually. Create a set sleep schedule by making some small changes to your routine. Instead of making abrupt shifts in your bedtime or wake-up time, adjust them gradually by 15 to 30-minute increments.
  • Minimize your gadget usage: Wind down activities and minimize electronic usage before bed to promote better sleep. Relax and prepare for quality sleep by dimming the lights and setting an alarm for 30 minutes to an hour before bed.
  • Reshuffle your sleeping arrangements: Are you finding it hard to get a good night’s sleep due to excessive sweating? Well, here’s a handy solution: consider upgrading to a cooling mattress or opting for cooling sheets. These innovative sleep essentials can help regulate your body temperature, and keep you comfortably cool throughout the night, ensuring a more blissful slumber. Memory foam pillows can work wonders in relieving neck and back discomfort in case you are struggling with backache.
  • Improve the bedroom environment: Create a sleep-friendly bedroom environment by adjusting the temperature for comfort, and blocking out disruptive lights, or noises that might disturb your restful slumber. And if your mattress, pillow, or sheets are worn out or no longer providing the support you need, consider treating yourself to new ones.

Published by Medicaldaily.com



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Omega-3 Fatty Acids Slow The Progression Of Amyotrophic Lateral Sclerosis: Study

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Omega-3 fatty acids are known for a range of health benefits, from promoting brain and heart health to reducing inflammation and protection against several chronic conditions.

In a new study, researchers found that omega-3 acids, especially the type found in foods like flaxseeds, walnuts, chia seeds, canola oil and soybean oil, can slow down the progression of amyotrophic lateral sclerosis (ALS).

It is a debilitating nervous system disease that gradually worsens over time and can be fatal. The condition results in a loss of muscle control and affects the nerve cells in the brain and spinal cord. It is also known as Lou Gehrig’s disease after the baseball player who was diagnosed with it.

The initial symptoms of the disease include muscle weakness, difficulty in walking and hand movements. The symptoms can slowly progress to difficulties with chewing, swallowing, speaking and breathing.

The exact cause of ALS is not known. However, around 10% of people get it from a risk gene passed down from a family member. It is estimated that more than 32,000 people in the U.S. live with the condition.

In the latest study, researchers from Harvard T.H. Chan School of Public Health in Massachusetts evaluated 449 people living with ALS in a clinical trial. The team assessed the severity of their symptoms, the progression of their disease, along with the levels of omega-3 fatty acids in their blood, for 18 months.

The study suggested that alpha-linolenic acid (ALA), a type of omega-3 found in plants, is particularly beneficial in slowing the progression of ALS. The participants with the highest levels of ALA had a 50% reduced risk of death during the study period compared to those with the lowest levels of ALA.

Researchers also found a reduction in death risk in participants who had eicosapentaenoic acid, the type of omega-3 fatty acid found in fatty fish and fish oil, and linoleic acid found in vegetable oils, nuts and seeds.

A previous study conducted by the same team suggested that a diet high in ALA and higher blood levels of the nutrient could reduce the risk of developing the condition.

“In this study, we found that among people living with ALS, higher blood levels of ALA were also associated with a slower disease progression and a lower risk of death within the study period. These findings, along with our previous research suggest that this fatty acid may have neuroprotective effects that could benefit people with ALS,” said Kjetil Bjornevik, the lead author of the study.

Published by Medicaldaily.com



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