She then advised that if you wake up in the morning with a headache or myalgia, you should wait for 24 hours before doing your lateral flow test (rapid antigen test).
Dr Coetzee added: “The rapid test can still be false negative in the first period, but after 24 hours up until five to six days later, the rapid test is more than sufficient to detect positive cases.
“We do, however, have patients who say they are not feeling very well, they just need to double-check, they have this headache, then we do PCR and normally that will be positive.”
Don’t forget the NHS states anyone with Covid symptoms should isolate until they receive a negative PCR test result.
source: express.co.uk