'“An increase of over 25% was detected in both call types during January–May 2021, compared with the years 2019–2020. That is to say, "increased rates of vaccination ... are associated with increased number of CA [cardiac arrest] and ACS [acute coronary syndrome]." By contrast, the trial "did not detect a statistically significant association between the COVID-19 infection rates and the CA and ACS weekly call counts."
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