Sorry this is only a quote from a very good interpretation of the Skripal's story. Please read the full link.MoA - Russian Scientists Explain 'Novichok' - High Time For Britain To Come Clean (Updated)
A highly potent nerve agent would hurt anyone who comes in contact with it. But the BBC reported that a doctor who administered first aid to the collapsed Yulia Skripal for 30 minutes was not affected at all. Another doctor, Steven Davies who heads the emergence room of the Salisbury District Hospital, wrote in a letter the London Times:
"... no patients have experienced symptoms of nerve agent poisoning in Salisbury and there have only been ever been three patients with significant poisoning."