White blood cells are produced in the bone marrow. They are released into the bloodstream and travel wherever they are needed. Low levels of neutrophils occur when the bone marrow cannot replace them as fast as needed. In babies, the most common cause is infection. A very severe infection may cause neutrophils to be used up quickly. It may also prevent the bone marrow from producing more neutrophils. Sometimes, an infant who is not sick will have a low neutrophil count for no obvious reason.
Mikoyan-Gurevich MiG-17. The Mikoyan-Gurevich MiG-17 (Russian: Ð¼Ð¸ÐºÐ¾ÑÐ½ Ð¸ Ð³ÑÑÐµÐ²Ð¸Ñ Ð¼Ð¸Ð³-17) (NATO reporting name: Fresco) (China:Shenyang J-5) (Poland: PZL-Mielec Lim-6) is a high-subsonic fighter aircraft produced in the USSR from 1952 and operated by numerous air forces in many variants.
Forget the F-22 and F-35, this is a real Super Maneuverable Fighter plane: the Russian Su-35 Flanker-E. The Su-35 (NATO designation Flanker E), Russiaâs latest version of the famous super-maneuverable multirole fighter jet has demonstrated its stunning capabilities during the first day of the 50th Paris Air Show at Le Bourget.