We ask our science correspondent Derrick Williams why injected vaccines aren't manafuctured with syringes.
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President Samia Suluhu Hassan has belatedly kicked off Tanzania's COVID-19 vaccination campaign. But the East Africa country still has a long path ahead if it wants beat the coronavirus.
The Treasury has told regional authorities in the US that they 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.
Messenger RNA are little helpers. Scientists have long studied their potential in medicine. COVID-19 gave them a chance to prove it. Could malaria be next?
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