There are fears that the number of infections in Afghanistan could be much higher than reported after one third of people randomly tested in the capital Kabul tested positive, AP news agency reports.
On Monday the number of positive cases rose to 2,894, with 90 deaths.
Although official figures seem relatively low, Afghanistan has limited access to testing and the health system has suffered under decades of conflict.
More than 150,000 Afghans returned from virus-stricken Iran during March, while tens of thousands of others returned from Pakistan, leading to concern that the virus may have spread inside the country.
Last month there were reports that dozens of members of staff at the presidential palace had also tested positive for the virus.
BBC