antibiotics
Taking antibiotics 'just in case' may have grave consequences, health officials warn.
'Using antibiotics when you don’t need them threatens their long term effectiveness.' - Public Health England
'One species we looked at...had the most powerful antibiotic effect of any species we tested'
'We will return to an era when millions of lives could be lost every year to simple infections.'
'Without effective antibiotics, minor infections could become deadly.'
Taking them for longer than necessary could fuel antibiotic resistance.
Here are six things to know.
Researchers said there's a 'potential need to limit the use of antibiotics'.
Experts say medication should only be used short-term.