Britain and other nations press on with AstraZeneca vaccine amid trial questions

Britain asked its regulator on Friday to assess AstraZeneca's Covid-19 vaccine for a possible rollout, while the Philippines and Thailand secured millions of doses, giving the shot a vote of confidence after experts raised questions about trial data. The UK government, which has secured 100 million doses of the vaccine developed by AstraZeneca and Oxford University, has targeted a rollout to begin before Christmas.