We ask our science correspondent Derrick Williams We ask our science correspondent Derrick Williams how long vaccines offer protection.
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President Samia Suluhu Hassan has belatedly kicked off Tanzania's COVID-19 vaccination campaign. But the East African country still has a long path ahead if it wants beat the coronavirus.
The European Union is now inoculating its population faster than the United States, but figures suggest that both have some way to go before they hit their previously announced inoculation targets.
The Treasury has said regional authorities in the US can use federal COVID relief funds to offer people $100 in return for getting vaccinated. The US has ample reserves, but a robust anti-vaccine movement.
The top US infectious disease official has also pleaded with citizens to get vaccinated, saying the country finds itself in an "unnecessary predicament." A number of states are seeing a fresh surge in infections.
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