In the search box, I type #Covid. I see a list of results like:

#CovidPR
0 people in the past 2 days
#covidca
0 people in the past 2 days
#covidBlues
0 people in the past 2 days
#CovidAware
0 people in the past 2 days
#CovidQuilt
0 people in the past 2 days
#CovidSixPack
0 people in the past 2 days
#covidsverige
0 people in the past 2 days
#COVIDisolator
0 people in the past 2 days
#CovidRespomse
1 person in the past 2 days

How do I find and follow a simple hashtag like #Covid?