A vaccine against COVID-19 is considered the only realistic hope of overcoming the virus. Several vaccines have now been approved. But does that mean an end to the pandemic and a return to "normal life" are in sight?
How much is a human life worth? An innovative cancer therapy promises to save lives. But it is extremely expensive.
Scientists across the world are working around the clock to develop a vaccine against the coronavirus - from China to the United States, Germany and Britain.