Questions swirl about the effectiveness of the AstraZeneca COVID-19 vaccine

<p>From the BBC World Service: Investors are assessing the implications of South Africa&#8217;s decision to suspend its rollout of the drugmaker&#8217;s coronavirus shot. What does that mean for global supply? Also, Cuba&#8217;s opening up its economy to private businesses. And, the U.N.&#8217;s climate action envoy calls for more green investments.</p>