COVID 19 Again? why

again
You must stay at home (self-isolate) again and ask for a test if you get symptoms of coronavirus (COVID-19) more than once.

The symptoms are a high temperature, a new, continuous cough or a loss or change to your sense of smell or taste.

You must also self-isolate again if someone you live with (or someone in your support bubble) gets symptoms again
Covid-19 disease affects different people in different ways. Most people who develop it have mild to moderate symptoms and recover without hospitalization.
The most common symptoms are:
Fever
dry cough
Exhaustion
Less common symptoms:
Pains and aches
Sore throat
Diarrhea
conjunctivitis
a headache
Losing a sense of taste or smell
Skin rash, or a change in the color of the fingers or toes