The deadly nerve agent has reared its head again in the United Kingdom, just four months after the poisoning of former Russian spy Sergei Skripal and his daughter Yulia. But what is Novichok?
For more from ABC News, click here: http://www.abc.net.au/news/
Follow us on Twitter: http://twitter.com/abcnews
Like us on Facebook: http://facebook.com/abcnews.au
Subscribe to us on YouTube: http://ab.co/1svxLVE
Follow us on Instagram: http://instagram.com/abcnews_au