Coronavirus tests that reveal if you've previously been infected with the virus should now be available to NHS and care staff in England. But what about the rest of the public?
First, what's the difference between an antigen and antibody test?
The swab test takes a sample from a person's throat and nose.
Anybody experiencing symptoms can request an antigen test from the NHS website, with priority testing available to essential workers.
This antigen test only reveals if you're currently infected with the virus.
The antibody tests differ from the antigen test in that it reveals if you've previously had the virus.
NHS and social care staff are now being offered a blood (antibody) test that is sent off to a laboratory.
NHS clinicians are also able to put forward NHS hospital inpatients, and care home residents, to receive this blood test.
There are finger-prick antibody tests that people can take at home.
However, the Department of Health and Social Care said: "These tests are currently not accurate enough.
"The Government is not offering them at present. We plan to offer this in the
future once more accurate tests are available."
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According to the medical website Patient, you may have been infected with Covid-19 if you felt the following symptoms:
A mild fever - not necessarily one that reached 37.8°C. The NHS add: "Your chest or back feel hotter than usual."
Some people may have lost their sense of smell - no longer able to enjoy the scent of fragrant cooking.
Others could have felt extremely tired, suffered from sore and achey muscles, as well as a headache.
Not particularly common, but not unheard of, a few may have suffered from a sore throat and a runny nose.
And for those who had a mild reaction to Covid-19, they wouldn't experience breathlessness.
Additionally, your normal acts of self-care would be normal, as would your appetite and the way you eat or drink.
However, you may have felt very sad and weepy while your body fought off the infection.
Although the Government isn't currently rolling out coronavirus antibody tests to the wider public, there are a handful available online.
High-street retailer Superdrug had offered the antibody test, but it has since suspended its sales following controversy.
The Medicines and Healthcare products Regulatory Agency (MHRA) weren't convinced about the reliability of such tests.
People are best to be cautious if ordering coronavirus antibody tests online.