https://fisd.oxfordshire.gov.uk/kb5/oxfordshire/directory/advice.page?id=HILSGDAEKa0
Someone who wants taught this subject in a college in Britain says that this is poor advice.
Many older people have got very strong immune systems.
How did our parents and ancestors survive without advice from the local authority
How my heart sings 
I suspect that the main causes of food poisoning arise from how the food is stored and handled at home. –
Wash your hands immediately before handling food and avoid cross-contamination between different foods are the main watchwords.
That’s a good reminder of how we can look after ourselves best.
Thank you very much,Mike