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Calcium is used to prevent and treat calcium deficiencies.
The health secretary says mask rules and travel tests will help to protect Christmas celebrations.
The new variant's genetic profile has raised concerns, but there's a shortage of real-world data.
Two people in the UK have been found to be infected with the new Covid variant, Omicron, the health secretary says.
Other groups have reported higher protection, but the results are still seen as a triumph.
A question everyone's asking: what's my Covid risk? Here's how to find out.
Borrowing - which hit a record £22.3bn in October - cannot go on indefinitely, chancellor says.