REACT227 Oct 2020 11:48
Second paragraph of the report says antibodies waning for all groups (different extents) except for health workers where antibodies remained visible. It's not really saying anything that we didn't know. The tests they used had only 82% sensitivity and have now been withdrawn by the MHRA.
So the two groups, health workers and care workers, who continue to be exposed continue to show active antibodies. No-one is getting it twice.
They will scrutinise these findings and recognise that more sensitive tests will be better to track the virus, antibodies work in tandem with T cells, B cell memory and antibodies and 24/40,000,000 people catching it twice, means that you are more likely to get struck by lightning than catch it twice. It does indicate you may only be able to categorically recognise you have had it, within 3 months of having it. But once you know that, you aren't getting it again as far as any measurable probability is concerned.