Gaza entered lockdown on Tuesday (August 25) after the first cases of COVID-19 were confirmed in the general population of the Palestinian enclave.
Four infections were confirmed in a single family in a refugee camp.
Gaza's health ministry said the cases were uncovered after a woman traveled to the West Bank, where she tested positive.
They are the first infections in Gaza that didn't involve people quarantined in border facilities after coming in from Egypt or Israel.
Schools, businesses and mosques were ordered to close late on Monday (August 24) for at least 48 hours.
Some people scrambled to stock up on essentials in groceries and bakeries - only a limited number of which were allowed to stay open.
The police meanwhile patrolled the largely empty streets ordering residents to stay at home.
In this territory of two million people, health authorities are concerned about the potentially disastrous combination of poverty, densely populated refugee camps and limited hospital facilities in dealing with an outbreak.