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COVID vaccines developed quickly — is a vaccine for HIV next?

Decades on from the start of the HIV/AIDS pandemic, researchers are yet to crack a successful formula for a vaccine. But now we have...

Fact check: Do COVID vaccines protect against the delta variant?

In the United Kingdom, people have died of the delta variant despite being vaccinated. Are existing COVID-19 vaccines still effective? A look at the...

Fact check: Did COVID vaccines cause the delta variant?

The delta variant is spreading rapidly — even in countries with a high vaccination rate. That gives grounds for wild speculation: Did the vaccines...