The phrase "are at various levels" is correct and usable in written English.
It can be used to describe a situation where different subjects or items exist at different degrees or stages of development, quality, or intensity.
Example: "The students in the class are at various levels of understanding, which makes it challenging to teach everyone effectively."
Alternatives: "exist at different stages" or "are on different tiers".
Many nations of the world including some developing countries have since launched their nanotechnology programs and are at various levels of success.
But the best newsletters as monitored by The Hulbert Financial Digest still say, as we reported last Friday, "Stay The Course!" Of 18 newsletters that have beaten the market over the last ten years, 12 are outright bullish (including Band) and three are at various levels of exposure.
Both individuals and organisations are at various levels of awareness, knowledge and skills along the cultural competence continuum".[ 55] A lack of culturally appropriate care can result in shame for women and avoidance of the health system [ 15, 33, 37].
Taking into consideration that mesenchymal-like cells, erythroblastic and megakaryoblastic lineages which are found in blood islands are at various levels of differentiation, blood islands might be sites of hematopoiesis.
Post hoc analysis was then indicated so as to identify what the TAT treatment effect was at various levels of initial weight loss.
These findings suggest that whilst nurses are not apolitical, they appear to be at various levels of political engagement in different countries.
Tumor cells disseminated into the bloodstream may be at various levels of differentiation and therefore may lose the expression of epithelial markers.
The availability of genome sequences and associated high-throughput sensitive technologies means that foods are being analyzed at various levels.
Consequently, the recorded sales numbers will include condoms that are being stocked at various levels of the distribution chain.
But there are people at various levels who have been claiming parental leave payments from taxpayers as well as from their employers".
Consistently, IP-10 expression has been shown to be modulated at various levels.
