A health worker being vaccinated.
JOHANNESBURG - The largest vaccination campaign in history is underway.
Almost 560 million COVID-19 vaccine doses have been administered across 141 countries.
Americans have received 145 million doses with an average of 2.7 million doses per day.
In China, unlike other countries, its vaccination programme first targeted people in high-risk jobs but is now moving to the elderly over the age of 60.
India started its programme early in January and its COVID-19 cases have soared from just over 11,000 daily to over 50,000 per day.
Its elderly will be eligible for jabs from next month.
Global vaccination campaign