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Home » World » Covid-19 Update: US OKs New Antibody Drug For High-Risk Patients

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Covid-19 Update: US OKs New Antibody Drug For High-Risk Patients

High-risk patients include cancer patients, organ transplant recipients and people taking immune-suppressing drugs.

Evusheld-AstraZeneca
USA has authorised use of Evusheld for high-risk patients. (Image courtesy: AstraZeneca website)

Washington: US health officials on Wednesday authorised a new COVID-19 antibody drug for people with serious health problems or allergies who can’t get adequate protection from vaccination.

Antibody drugs have been a standard treatment for treating COVID-19 infections for over a year. But the AstraZeneca antibody-drug cleared Wednesday by the Food and Drug Administration is different. It’s the first authorised for long-term prevention against COVID-19 infection, rather than a short-term treatment.

People who could benefit from the antibody-drug include cancer patients, organ transplant recipients and people taking immune-suppressing drugs for conditions like rheumatoid arthritis. Health experts estimate about 2 per cent to 3 per cent of the U.S. population falls into that group.

“These people still have to shelter in place because they’re at really high risk of severe disease and death,” said Dr. David Boulware of the University of Minnesota, ahead of the announcement. “So having this therapy will enable a lot of them to get back to their normal lives.”

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Specifically, the FDA authorised the AstraZeneca drug called Evusheld for adults and children 12 and older whose immune systems haven’t responded adequately to COVID-19 vaccines or have a history of severe allergic reactions to the shots. Regulators said the required two antibody injections may be effective at preventing COVID-19 infections for six months.

Like similar drugs, AstraZeneca’s delivers laboratory-made versions of human antibody proteins, which help the immune system fight off viruses and other infections.

The FDA and other health authorities have stressed that antibody drugs are not a substitute for vaccines, which are the most effective, long-lasting and economical form of virus protection. Antibody drugs are tricky to manufacture and often cost more than $1,000 per dose compared with vaccines that are typically under $30 per shot.

The FDA has authorised three other antibody therapies from Regeneron, Eli Lilly and GlaxoSmithKline, with the US government purchasing hundreds of thousands of doses. All require an IV or injection.

They are used to treat people with recent infections who have the highest risk of progressing to severe COVID-19 because of other health issues. Two can be used to prevent infection after a possible coronavirus exposure. AstraZeneca’s drug would be used differently— only as a long-term preventive measure in people who have increased vulnerability to the virus.

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In a company study, people who received Evusheld had a 77 per cent lower risk of infection than people who received a dummy shot over six months, the FDA said.

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