The phrase "art has improved" is correct and usable in written English.
You can use it when discussing the evolution or enhancement of artistic practices, styles, or quality over time.
Example: "Over the last few decades, art has improved significantly, reflecting changes in society and technology."
Alternatives: "art has advanced" or "art has evolved."
In resource-poor countries, access to antiretroviral therapy (ART) has improved during the last years and mortality rates among treated patients have declined substantially [ 1, 2].
The free ART has improved HIV-infected patients' quality of life, prolonged patients' lives, and reduced the AIDS mortality rate [ 2, 3].
The availability of ART has improved over time, but the impact on population-level mortality may still take some time to observe.
In this review, I examined the effects of ART on the QOL of people living with HIV and AIDS, and how ART has improved the QOL of HIV/AIDS patients.
Access to antiretroviral treatment (ART) has improved substantially in sub Saharan Africa over the past decade, but high rates of mortality are still reported, especially in the first few months of treatment.
The efficacy of combination ART has improved, and access to ART has increased drastically; therefore, in many settings drug efficacy and lack of drugs can no longer be blamed for the high rates of in-hospital mortality.
Programming, especially in the arts, has improved lately, but the stations have never escaped their sleepy image, and their most fervent backers today are not educators but ethnic groups that lease inexpensive air time.
Though technology to look below the earth has improved, oil exploration is still more an art than a science.
Without doubt, the art market has improved its practices regarding looted objects in the last decade, but it has not done enough for Cambodia.
The art of photography has improved itself a lot over the years.
The introduction of antiretroviral viral therapy (ART) in 1996 has improved survival and quality of HIV-infected patients in the developed countries.
