Even mild COVID-19 can reduce brain size: Study

MRI imaging was used to study the brains of people who had recovered from COVID-19. (File/Reuters)
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Updated 07 March 2022
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Even mild COVID-19 can reduce brain size: Study

  • Patients in UK recorded 0.2-2% loss in brain size
  • Largest reduction in areas responsible for taste, smell

LONDON: Even mild forms of COVID-19 can cause a reduction in brain size, according to scientists in the UK.

They scanned the brains of over 400 people who had previously had COVID-19, most of them mild cases.

They found that the overall brain size in infected participants had shrunk between 0.2 and 2 percent, and patients experienced losses in grey matter in the olfactory areas, linked to smell, and regions linked to memory.

The apparent effect of this was that those who had recently recovered from COVID-19 found it a bit harder to perform complex mental tasks.

The study was published on Monday in the science journal Nature. Lead author of the study Professor Gwenaelle Douaud, from Oxford University’s Wellcome Centre for Integrative Neuroimaging said: “We were looking at essentially mild infection, so to see that we could really see some differences in their brain and how much their brain had changed compared with those who had not been infected was quite a surprise.”

The study used biological information from a separate project, the UK Biobank, which has followed the health of 500,000 people for about 15 years and has a database of scans recorded before the pandemic — providing a unique opportunity to study the long-term health impacts of the virus.

Scientists also do not know whether there is any variation in the effect that COVID-19 variants have on the brain — the research was carried out when the original virus and alpha variant were most common.

Researchers also do not know yet whether these changes are permanent, but Douaud said: “We need to bear in mind that the brain is really plastic — by that we mean it can heal itself — so there is a really good chance that, over time, the harmful effects of infection will ease.”


Trump calls for one year cap on credit card interest rates at 10 percent

Updated 6 sec ago
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Trump calls for one year cap on credit card interest rates at 10 percent

  • Trump says Americans have been ‘ripped off’ by credit card companies
  • Lawmakers from both parties have raised concerns about rates

WASHINGTON: US President Donald Trump said on Friday he was ​calling for a one-year cap on credit card interest rates at 10 percent starting on January 20 but he did not provide details on how his plan will come to fruition or how he planned to make companies comply.
Trump also made the pledge during the campaign for the 2024 election that he won but analysts dismissed it at the time saying that such a step required congressional approval.
Lawmakers from both the Democratic and Republican Parties have raised concerns about high rates and have called for those to be addressed. Republicans currently hold a narrow majority in both the Senate ‌and the House ‌of Representatives.
There have been some legislative efforts in Congress ‌to pursue ⁠such ​a proposal ‌but they are yet to become law and in his post Trump did not offer explicit support to any specific bill.
Opposition lawmakers have criticized Trump, a Republican, for not having delivered on his campaign pledge.
“Effective January 20, 2026, I, as President of the United States, am calling for a one year cap on Credit Card Interest Rates of 10 percent,” Trump wrote on Truth Social, without providing more details.
“Please be informed that we will no longer let the American Public be ‘ripped off’ by Credit Card Companies,” Trump added.
The ⁠White House did not immediately respond to a request for comment on details of the call from Trump, but said on ‌social media without elaborating that the president was capping the rates.
Some ‍major US banks and credit card issuers ‍like American Express, Capital One Financial Corp, JPMorgan , Citigroup and Bank of America did not immediately respond ‍to a request for comment.
US Senator Bernie Sanders, a fierce Trump critic, and Senator Josh Hawley, who belongs to Trump’s Republican Party, have previously introduced bipartisan legislation aimed at capping credit card interest rates at 10 percent for five years. This bill explicitly directs credit card companies to limit rates ​as part of broader consumer relief legislation.
Democratic US Representative Alexandria Ocasio-Cortez and Republican Congresswoman Anna Paulina Luna have also introduced a House of Representatives bill to cap credit card ⁠interest rates at 10 percent, reflecting cross-aisle interest in addressing high rates.
Billionaire fund manager Bill Ackman, who endorsed Trump in the last elections, said the US president’s call was a “mistake.”
“This is a mistake,” Ackman wrote on X.
“Without being able to charge rates adequate enough to cover losses and earn an adequate return on equity, credit card lenders will cancel cards for millions of consumers who will have to turn to loan sharks for credit at rates higher than and on terms inferior to what they previously paid.”
Last year, the Trump administration moved to scrap a credit card late fee rule from the era of former President Joe Biden.
The Trump administration had asked a federal court to throw out a regulation capping credit card late fees at $8, saying it agreed with business and banking groups that alleged the rule was ‌illegal. A federal judge subsequently threw out the rule.