The phrase "and considered virtually" is correct and usable in written English.
It can be used when discussing something that is regarded as almost or nearly a certain way, often in a context of evaluation or assessment.
Example: "The results of the experiment were and considered virtually conclusive, leading to a strong recommendation for further research."
Alternatives: "and deemed almost" or "and regarded as nearly".
This involves a reconstruction of the patriarchal age (of Abraham, Isaac, Jacob, and Joseph; early 2nd millennium bc), which until the end of the 19th century was unknown and considered virtually unknowable.
At only about three metres long it is much smaller than many of its cousins, and considered virtually harmless to humans.
Tube formation by hASCs was not observed and considered virtually absent.
The retail distribution of drugs has been described as chaotic [ 29] and is considered virtually unregulated.
However, in Madagascar's capital city, death registration was established around the start of the 20th century and is now considered virtually complete.
Revered around the world for their high morals and ethics and devotion to duty, Japanese police were considered virtually incorruptible and highly efficient in solving crimes.
But the parasite evolved, the resistant strains spread, and chloroquine is now considered virtually useless against falciparum malaria in many parts of the world, including sub-Saharan Africa.
The digital computer works so fast that for navigational purposes it can be considered virtually instantaneous and can therefore provide continuous information for control purposes.
The traditional parliamentary privilege which is still guaranteed in the United States to members of Congress and to state legislators can be considered virtually absolute in the protection it provides legislators against being held accountable "in any other place" for what they utter in a legislative body.
When he reappeared in the 2,000 Guineas over one mile at Newmarket on 6 May he was considered virtually unbeatable and, with only six other colts turning out to oppose him, he started at odds of 1/3.
Registration of cancer has been mandatory by law since 1952, and the registry is therefore considered virtually complete.
