Boris Johnson is "in good spirits" and is being given oxygen, after spending the night in intensive care.
More than 750,000 people signed up to join the "volunteer army" to support 2.5 million at-risk people.
The new Labour leader held a call with community representatives about anti-Semitism in the party.
Latest figures show some are happening in the community but most are on hospital wards.
Countries should now question whether keeping schools shut is justified, says one team of scientists.