The star had been playing at the Hotel Cafe on December 15 and took to Instagram to praise the audience, however she says she picked up the virus at the gig.
She wrote: ‘I got covid at this show BUT the audience could clap in time.’
She added the word, ‘balance’.
One fan responded: ‘Omg babyyy, but hope you are ok now????? I hope so.’
Another chimed in: ‘Hope you’re feeling better today! Sending all the love to you.’
‘Hope you are feeling much better, sending you hugs and much love…’
Jessie J had previously shared on the social media platform her anguish after suffering a miscarriage in November.
She previously posted: ‘Yesterday morning I was laughing with a friend saying “seriously though how am I going to get through my gig in LA tomorrow night without telling the whole audience I am pregnant”.
‘By yesterday afternoon I was dreading the thought of getting through the gig without breaking down… After going for my 3rd scan and being told there was no longer a heartbeat.’
She added: ‘This morning. I feel like I have no control of my emotions. I may regret posting this. I may not. I actually don't know. What I do know is that I want to sing tonight. Not because I'm avoiding the grief or the process, but because I know singing tonight will help me.
‘I have done 2 shows in 2 years and my soul needs it. Even more today. I know some people will be thinking she should just cancel it. But in this moment I have clarity on one thing. I started singing when I was young for joy, to fill my soul and self love therapy, that hasn't ever changed and I have to process this my way.’
She later added another post on Insta addressing her first post about her lost child, saying: ‘I posted about losing my baby just hours after I was told. I reacted in work mode. It’s safe to say I sometimes pour more energy into creating an unhealthy process of my own pain in front of a camera, than I do acknowledging it behind one in real time. “The show must go on” mentality reacted before the human in me did.’
She added: ‘I guess I’m here to say to anyone who may not have been told this, you are allowed to be broken. You are allowed to cry. Allowed to be weak. Allowed to be exhausted from the pain and the bleeding and the grief that barely has space to exist. You are allowed to do this however YOU need to.
‘Sometimes life just calls us to be human.
‘We know there will be sunshine, but we can’t avoid the rain.’