More than half of the population of Germany has received a booster vaccination against the coronavirus, the country’s disease control agency said on Thursday, as the nation seeks to bolster its defences against Omicron. About 43 million people, or 51.7 per cent of the population, have been boosted, the Robert Koch Institute (RKI) reported, noting that the jabs offered significant protection against the highly transmissible new variant. The landmark moment in the vaccination campaign came as records were set yet again in coronavirus infections. The seven-day incidence, which records the average…