Vaccination is the main determinant for whether a country can successfully keep case numbers down.
]The fourth wave of the coronavirus pandemic is breaking over Europe, with few countries being spared a worrying rise in cases.
Comprehensive vaccination, it turns out, is necessary — but not sufficient — to contain the spread of the virus, which thrives in autumn and winter weather. Countries that had widely relaxed social-distancing restrictions over the summer are now considering re-implementing measures to stem the tide of increasing cases and hospitalizations.
Vaccination “solves part of the problem, but not all of it,” said Hajo Zeeb, professor of epidemiology at the University of Bremen. While vaccination does protect against infection, it’s not fool proof. Just as worrying is that immunity is waning, leading to countries turning to booster shots. “I think even the public are realizing that it's not all over,” he said.
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