The Kremlin welcomed Trump's offer of help while Russia's health watchdog said Moscow was "ready to assist the US in tackling infectious disease outbreaks," as the WHO asked Russia for additional information.
Britain's George Russell will start from the back of the grid in Sunday's Singapore Grand Prix because of a power-unit penalty from last weekend's race.
The Government's delay in bringing the Verifactu e-invoicing system into force gives firms and the self-employed more time, but fuels uncertainty over its rollout.