The word "subtypes" is correct and usable in written English.
It is typically used in contexts where categories or classifications are being discussed, particularly in scientific or technical fields.
Example: "In biology, there are several subtypes of the virus that exhibit different characteristics."
Alternatives: "Categories" or "Variations".
These are done by looking at differences between the genetic material of the seven or eight main subtypes of HIV-1 and asking how long those differences took to arise.
That complicates the CHAT theory enormously, for it would mean that the vaccine must have introduced all the subtypes separately each, presumably, from the kidneys of a different chimpanzee that was infected with the relevant virus.The correlation between vaccination sites and early records of HIV-1 was also called into question.
Subtypes B and E, though, are not common there.There is also some doubt about how much actual boosting is going on.
This continent, the place where HIV originated, has the greatest variety of subtypes.
One of them will be able to distinguish about 20 different subtypes of leukaemia, and a second will be able to pinpoint mutations in the p53 gene, which can affect a cancer patient's prognosis.
A full course of the RV144 regime lasted six months and consisted of four shots of ALVAC and two of AIDSVAX.One criticism of RV144 is that the versions of the antigens it used came from subtypes B and E of HIV.
But two of the speakers, Bette Korber from the Los Alamos National Laboratory in New Mexico and Anne-Mieke Vandamme, of the University of Leuven in Belgium, employing three different methods of calculation between them, showed that the most recent common ancestor of the existing subtypes probably existed in the 1920s or 1930s.
At least 10 types of clubs were made, each with several subtypes.
Dry climates are divided into arid (BW) and semiarid (BS) subtypes, and each may be differentiated further by adding a third code, h for warm and k for cold.
One subtype, here designated as slow climbing, differs profoundly from the other subtypes of the category, being somewhat ponderous and devoid of elements of leaping or jumping.
Above the tree line, alpine vegetation comprises a variety of different subtypes including grasslands, mires, low heathlands, and crevice-occupying vegetation.
