The phrase "are partially effective" is correct and usable in written English.
It can be used to describe something that has some level of effectiveness but is not fully effective.
Example: "The new policies implemented by the company are partially effective in improving employee satisfaction, but more changes are needed."
Alternatives: "are somewhat effective" or "have limited effectiveness."
Although these treatments are partially effective, the molecular effects of these drugs on filarial nematodes are not completely understood [ 2].
However, conventional pharmacological therapies are partially effective and have unpleasant adverse effects inevitably.
Current practices for prostate cancer are partially effective; however they are not specific for the disease, causing many unwanted side effects and over-diagnoses.
"The same hospital which does great at inserting a central line and maintaining that central line might do poorly in the way it handles urinary catheters," he said, adding, "All hospitals are partially effective.
Development of effective vaccines to combat influenza is a difficult task, although existing vaccines are partially effective and are recommended for people at high risk i.e., the elderly and those with chronic disease of the respiratory or circulatory systems.
Group social skills interventions (SSI) are partially effective for addressing the communication and social interaction impairments experienced by individuals with autism spectrum disorders (ASD).
Patient 1 received different psychotropic medications which were partially effective but accompanied by multiple side effects.
Eleven interventions were considered highly effective (36%), 15 were partially effective (48%), and 5 had low effectiveness (16%).
With F. lutea extract being partially effective on C2C12 cell glucose uptake, the effect of the F. lutea in the presence of insulin (1 μM and 10 μM) was evaluated.
In relation to the effectiveness, two were highly effective and three were partially effective.
These drugs have been partially effective in improving, if not curing, viral diseases without causing major toxic side effects.
