They found that of more than 1.2 million adults who received at least one dose of either the Pfizer-BioNTech, Oxford-AstraZeneca, or Moderna vaccine, fewer than 0.5 per cent reported a breakthrough infection over 14 days after their first dose.
People most vulnerable to a breakthrough infection after their first vaccine dose included frail older adults, 60 years and older, and those living with underlying conditions such as obesity, heart disease, kidney disease, and lung disease, they said.
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After dropping below one, Covid R-value rises sharply to 1.17 in second half of August
When the second wave swept through the country between March to May, the R-value was 1.37 (between March 9 to April 21). From May 15-June 26, the R-value stood at 0.78. However, it slowly started increasing — it was 0.88 from June 20-July 7, 0.95 from July 3-22, 0.96 from July 24-27. It breached the value of 1.03 for the first time after the second wave during July 27-31. However, since then it has slowly started to decline.
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