Leave home for any medical need or to ca re leave home for any medical need or to care for a Vulnerable Person. Finally, you can travel to and from work, but only when absolutely necessary and if you cannot work from home. Hello, this is bbc news. A quarter of the world is now in some form of lockdown in the battle against coronavirus and that of course is throwing up a multitude of questions people want answered. Lets try to a nswer people want answered. Lets try to answer some of them on bbc your question answered. Im joined by a Public Health specialist at london. Im alsojoined by Public Health specialist at london. Im also joined by the editor of the scientist magazine. Thanks both of you for being with us. Straight to the questions. Id like to volunteer, says rachel. To support the nhs. How will volunteers be protected from the risk of contracting covid 19 . Protected from the risk of contracting avid19 . This is protected from the risk of contracting covid19 . This is a very good