GENEVA (AP) — The World Health Organization announced Monday that it and leading partners have agreed to a plan to roll out 120 million rapid-diagnostic tests for the coronavirus to help lower- and middle-income countries make up ground in a testing gap with richer countries — even if it’s not fully funded yet.

At $5 apiece, the antigen-based rapid diagnostic tests for which WHO issued an emergency-use listing last week, the program initially requires $600 million and is to get started as early as next month to provide better access to areas where it’s harder to reach with PCR tests that are used often in many wealthier nations.

The rapid tests look for antigens, or proteins found on the surface of the virus. They are generally considered less accurate — though much faster — than higher-grade genetic tests, known as PCR tests. Those tests require processing with specialty lab equipment and chemicals. Typically that turnaround takes several days to deliver results to patients.

WHO Director-General Tedros Adhanom Ghebreyesus hailed the program as “good news” in the fight against COVID-19.