Carbon Monoxide poisoning has a lot of manifestations, none of them pleasant and some (obviously including but not restricted to death) permanent.
The BBC site, linked above, explains some of the symptoms which might be mistaken for something else entirely which is pretty much what has happened in a situation which I became aware of through my work
Some symptoms can occur a few days or even months after exposure to carbon monoxide. These may include confusion, loss of memory and problems with coordination.
Honestly, when an elderly person presents with these symptoms it isn’t the first thing that springs to mind. But when all the other members of the household also begin to present in the same way, well..
Do yourselves a favour and get amonitor for your home – and the homes of your relatives. They are not expensive and the ongoing cost can be tragic beyond measure.. and that is my service announcement for the day!
I’ll switch off ‘lecture mode’ now!