coronavirus vaccine while Britain's AstraZeneca said its deliveries were running "a little bit late" as countries around the world sought to conquer the pandemic and rescue their economies.A vaccine is seen as the world's best bet for taming a virus that has infected more than 48 million people, led to more than 1.2 million deaths, roiled economies and disrupted billions of lives since it was first identified in China in December.Australia is beefing up its prospective arsenal against the pandemic to 135 million doses of various vaccine candidates."We aren't putting all our eggs in one basket," Prime Minister Scott Morrison said on Thursday.Some 45 vaccine candidates are in human trials worldwide, with Pfizer Inc saying it could file in.