The decisions of both Joe Biden and Boris Johnson in recent days will ensure the Covid death toll will go far higher. Extending the pandemic allows the ruling class offensive to continue. It is the centrepiece of government policy. So the struggle will be a prolonged one.
Austerity measures are integral to the current economic policies of the US and UK. They amount to an all-round attack on wages and the social wage while there is a temporary boost to demand. That is why it is extremely foolish and misleading to compare them to the policies of Corbyn, McDonnell or Keynes.
On foreign policy, Biden will appear to be different from Trump, but the broad outlines of their policy will be identical.