It was the first day in almost ten weeks the Department of health reported no deaths from the virus.
And Derry GP Dr Tom Black says that this shows that “lockdown is working.”
“But we are not there yet,” Dr Black, chair of the British Medical Associaiton here, told BBC Radio Foyle on Wednesday.
“There is still a way to go because there are still patients with the virus in the community.”
Dr Black is asking people to stick with social distancing and hand washing to prevent the further spread of the deadly virus.
He says a second wave – and a number of further outbreaks of the virus – are expected, which could overwhelm hospitals.
He says there is still a risk health care workers could transmit the virus to people because of the level of their exposure to the virus.
“When we started this we were all worried we would catch this from patients.
“Now we are worried we will give this to patient,” he says.
Doctors and scientists fear a second wave of the Coronavirus if there is an easing of social distancing measures.
On Wednesday, South Korea reported 40 new Coronavirus cases for its biggest daily jump in nearly 50 days.
The jump in new cases comes as pupils return to school in South Korea.