News|Coronavirus pandemic
COVID Delta variant as transmissible as chickenpox: US report
Internal CDC report, quoted by NYT, says Delta variant likely to break through protections afforded by the vaccines.
The variant has be blamed for the explosion of infections not only in the US, but also across the world, including in several Southeast Asian countries where cases have surged overwhelming healthcare systems [Juni Kriswanto/AFP]
30 Jul 2021
The Delta variant of the coronavirus is as contagious as chickenpox and could cause severe illness, according to an internal document at the United States Centers for Disease Control and Prevention (CDC), The New York Times reported on Friday.
The latest development comes as US President Joe Biden said that “in all probability” new guidelines or restrictions would be imposed in response to a resurgence of COVID-19 cases.
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The Delta variant has been blamed for the explosion of infections not only in the US, but also across the world, including in several Asian countries where cases have surged overwhelming healthcare systems.
In China, health authorities reported that the country’s most serious surge of infections in months spread to two more areas Saturday – Fujian province and the sprawling megacity of Chongqing, with at least 200 cases linked to the Delta cluster in Nanjing as of Saturday.
The US report said that the variant was also more likely to break through protections afforded by the vaccines, adding that CDC’s decision to reverse course on masking guidelines for fully vaccinated citizens on Tuesday is based on the document.
The agency had previously said the vaccinated did not need to wear masks indoors.
Still, the CDC’s figures show that the vaccines are highly effective in preventing serious illness, hospitalisation and death in vaccinated people, according to experts quoted by the newspaper.
The Delta variant, which was first reported in India, is more transmissible than the viruses that cause MERS, SARS, Ebola, the common cold, the seasonal flu and smallpox, the report said.
The immediate next step for the agency is to “acknowledge the war has changed”, the report cited the document as saying.
CDC Director Rochelle Walensky told the Times that new research showed the vaccinated people infected with the Delta variant carried tremendous amounts of the virus in the nose and throat.
High viral load
Meanwhile, a new CDC study published on Friday showed that three-quarters of individuals who became infected with COVID-19 at public events in a Massachusetts county had been fully vaccinated, suggesting the Delta variant of the virus is highly contagious.
The study identified 469 people with COVID-19, 74 percent of whom were fully vaccinated, following large public events in the state’s Barnstable County.
Testing identified the Delta variant in 90 percent of virus specimens from 133 people.
⚠️Holy Mother—the worst CDC #DeltaVariant report ever:
📌MORE CONTAGIOUS than Smallpox*
📌DOUBLE transmission of Wuhan 1.0*
📌MORE SEVERE than ever*
📌 Vaccinated can transmit* & breakthrough viral loads ~ unvaxxed.
➡️*Ever item I have warned before🧵​​
— Eric Feigl-Ding (@DrEricDing) July 30, 2021
The viral load was similar in people who were fully vaccinated and those who were unvaccinated, the CDC said.
High viral loads suggest an increased risk of transmission and raised concern that, unlike with other variants, vaccinated people infected with Delta can transmit the virus, it said.
The finding of the report “is concerning and was a pivotal discovery leading to CDC’s updated mask recommendation,” Walensky said in a statement.
Officials have warned of rising COVID-19 infections in the US, particularly among about half of the population that remains unvaccinated, despite a successful rollout that has seen an excess stock of the inoculant.
The vaccine hesitancy among large swaths of the country, fuelled largely by misinformation, has scuttled the government’s hopes of controlling the virus within months of the vaccine being approved for emergency use.
Washington has resorted to increasingly blunt methods to encourage the remaining citizens to be vaccinated, including requiring federal employees to get the jab or be subject to mandatory testing and other restrictions.
On Thursday, the Biden administration called on state and local governments to offer $100 payments for newly vaccinated Americans, funded by $350bn in aid granted under the American Rescue Plan Act.
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