By Jennifer Rigby and Emma Farge
LONDON (Reuters) -&nbsp;People&nbsp;all over the world&nbsp;lost&nbsp;confidence in the importance of routine&nbsp;childhood&nbsp;vaccines&nbsp;against killer diseases like measles and polio&nbsp;during&nbsp;the&nbsp;COVID-19&nbsp;pandemic, according to a new report from&nbsp;UNICEF.
In 52 of the 55 countries surveyed, the public perception of&nbsp;vaccines&nbsp;for children declined between 2019 and 2021, the UN agency said.
The data was a "worrying warning signal" of rising vaccine hesitancy amid misinformation, dwindling trust in governments and political polarisation,&nbsp;UNICEF, the United Nations Children's Fund, said.
"We cannot allow confidence in routine immunizations to become another victim of the&nbsp;pandemic," Catherine Russell,&nbsp;UNICEF&nbsp;executive director, said in a statement. "Otherwise, the next wave of deaths could be of more children with measles, diphtheria or other preventable diseases.&rdquo;
The change in perception was particularly worrying, the agency said, as it comes after the largest sustained backslide in&nbsp;childhood&nbsp;immunization in a generation&nbsp;during&nbsp;COVID&nbsp;disruptions.
In total, 67 million children missed out on one or more potentially lifesaving&nbsp;vaccines&nbsp;during&nbsp;the&nbsp;pandemic, and efforts to catch up have so far stalled despite increasing outbreaks.
The picture on vaccine confidence varied globally, according to the&nbsp;UNICEF&nbsp;report, its flagship annual State of the World's Children.
In countries including Papua New Guinea and South Korea, agreement with the statement "vaccines&nbsp;are important for children" declined by 44%, and by more than a third in Ghana, Senegal and Japan. In the United States, it declined by 13.6 percentage points. In India, China and Mexico, confidence remained broadly the same or increased, the report added.
The report stressed that vaccine confidence can easily shift and the results may not indicate a long-term trend.
Despite the fall in confidence, more than 80% of respondents in almost half of the countries surveyed still said&nbsp;childhood&nbsp;vaccines&nbsp;were important.
The data was collected by the Vaccine Confidence Project at the London School of Hygiene and Tropical Medicine.
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(Reporting by Jennifer Rigby and Emma Farge; Editing by Bill Berkrot)

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People lost faith in childhood vaccines during COVID pandemic, UNICEF says