The phrase "a possible focus" is correct and usable in written English.
It can be used when discussing potential areas of concentration or attention in a particular context or subject matter.
Example: "In our research, we identified a possible focus on the impact of climate change on local ecosystems."
Alternatives: "a potential focus" or "an alternative focus".
During a wide-ranging luncheon interview with reporters, Mrs. Obama said she intended to spend part of the coming year shaping a more international message, with a possible focus on issues of maternal and child health.
As the first person to step foot on the moon, a rocket named after Alan Shepard indicates a possible focus on human-rated rockets capable of lunar destinations.
The idea is to use the funding from Microsoft to further develop new features, including an HTML5 web client and — although this is not stated — a possible focus on how to bring the service to Windows platforms?
It is suggested to continue aspects of this research in a transdisciplinary format, i.e., science with society, in response to globally-expanding needs and concerns, with a possible focus on enhanced engagement of indigenous peoples and elders.
In both versions, it may be possible to shorten the incubation time, a possible focus for future work.
Most of our clinical isolates came from public health laboratories in the eastern United States, suggesting a possible focus in that area.
A third possible focus is on pleasure understood as a property of something bad such as a sadistic thought or act, rather than as an effect of something bad.
One possible focus of a recount would be Cedar County, in eastern Iowa, where officials last week recorded the only tie in the state: 4,025 votes each for Mr. Bush and Mr. Gore.
A possible unstable focus has been identified in the Aosta Valley.
While unfortunately a blood culture was not taken in our patient, the presence of gallstone, good pre-morbid status and prompt resolution of fever after antibiotics would point against a possible endovascular focus of infection.
The role of radio broadcasting health messages and a possible greater focus of the MCP in the lowland compared to the highland area should be taken into consideration by the malaria program coordinators.
