Professor Glen Mola, who is head of obstetrics and gynaecology at the Port Moresby General Hospital, has warned that everyone should remain vigilant and keep up with good hygiene.
The National newspaper reports that Mola warned the nation earlier this year that the Covid-19 would become a pandemic.
He predicts a surge in the number of cases in the coming months, as the threat of the Covid-19 is still high and said those with colds and fever should stay at home in order to protect themselves and others.
If the cold develops and results in shortness of breath, people should call the Covid-19 hotline.
He urged those in the National Capital District to check into the Rita Flyn isolation centre which had been prepared to treat specifically the Covid-19 cases. "Don't be scared about this pandemic," he said.
"A lot of people affected with Covid-19 only have mild symptoms with few ended up very sick. Just be mindful of older people as they are the ones that are really affected."
Mola said people should also be more concerned about the diseases such as Tuberculosis, HIV/AIDS, typhoid and malaria.
"People are dying from these diseases."
The country recorded its 10th and 11th Covid-19 cases late last month, both in Port Moresby.
National pandemic controller David Manning said the cases proved that there was local transmission in Port Moresby and the risk was very high.
"More cases maybe identified in the coming days. Papua New Guinea needs to remain vigilant to stop the transmission. The country needs to work together to apply the new normal. This will mean changing our ways of doing things and replacing them with behaviour and actions to reduce infection," Manning said.