Greece reports spike in cases as Danish expert advises against easing – as it happened

UN says getting students safely back must be top priority'; France says situation is precarious'; record fines for isolation breaches in Australia

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12.31am BST

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Related: Coronavirus live news: Trump pressed on false death rate claim as Europe faces second wave

11.44pm BST

A technical problem has caused a lag in California's tally of coronavirus test results, casting doubt on the accuracy of recent data showing improvements in the infection rate and number of positive cases, and hindering efforts to track the spread, the state's top health official said.

Health and human services secretary Dr Mark Ghaly said in recent days California has not been receiving a full count of tests conducted, or positive results, through electronic lab reports due to the unresolved issue, which he did not describe in detail.