AS DELTA SPREADS: Some travelers double up on COVID-19 vaccine

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WASHINGTON- Alison Toni felt lucky to get Sinovac’s COVID-19 vaccine in Chile earlier this year. A month later, she was in Minnesota getting vaccinated again.

Toni, an American living in Chile, was visiting her parents in Minneapolis in April when she got her first Pfizer shot at a CVS pharmacy. She traveled back for the second dose in June. She did not disclose being previously vaccinated.

“They didn’t ask, and I didn’t tell,” said Toni, 55. She took that step after reading that China’s Sinovac vaccine had a lower efficacy than the Pfizer Inc shot, developed with German partner BioNTech, and the Moderna Inc shot, both widely available in the United States. She also consulted with her doctor beforehand.

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Toni is among the group of people coming from abroad who have been vaccinated a second time, or plan to do so, in the United States.

Their reasons range from concerns that the vaccines immediately available to them were not effective enough, fears that they require extra protection against the fast-spreading Delta variant, or a need to meet specific requirements for work or travel. Some are seeking medical advice, others are relying on their own research.

The United States is developing a plan to require nearly all foreign visitors be fully vaccinated, potentially creating similar issues for many people inoculated with vaccines not approved by the FDA.

Britain and the European Union’s lists of approved vaccines do not include shots made in Russia or China, which have been used in many countries.

“Governments should standardize their definition of fully vaccinated to include shots that may not be approved in their countries, but which are still effective,” said Dr Amesh Adalja, senior scholar at the Johns Hopkins Center for Health Security.

“This whole process needs to be fixed, otherwise, as we get more vaccines and more people traveling, this will only happen more,” Adalja said.

A few countries are also beginning to offer a third booster dose to their citizens based on evidence that the initial protection from vaccines wanes over time, or that an extra shot may help prevent infection against Delta, particularly for older people or those with weak immune systems.

Public health officials have not determined if booster doses are needed for the general population, and there is not yet much data on the relative risks and benefits of complete revaccination.

“It is probably more than is needed,” said Jason Gallagher, an infectious diseases expert at Temple University’s School of Pharmacy. “A fourth dose is probably a waste; a third dose is probably unnecessary for a lot of people.”

The World Health Organization (WHO) has urged countries to hold off on boosters while many people worldwide wait to receive their first doses. – Reuters

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