Biden signs healthcare order to undo Trump 'damage' as US detects two South Africa Covid variant cases – as it happened

• Biden signs executive order on health marketplaces
• Cases of variant detected in South Carolina
• US economy shrank by 3.5% in 2020
• House members ask for more security amid fears they're targets
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1.00am GMT

Here's a review of today's news, from me and Amanda Holpuch:

12.42am GMT

Earlier this month, the New York-based photographer Hee Jin Kang woke up at 3am and went online to register her elderly parents for the coronavirus vaccine.

She created accounts on five different websites, including portals for state-run vaccination programs as well as hospitals, pharmacies and primary care locations. After hours of clicking through and refreshing various landing pages, she secured time slots for both parents.

Related: Hours of scrolling, endless refreshing: US tech woes make scheduling vaccine a nightmare