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Most babies do not have adverse reactions after vaccination. Some baby vaccinated will fever, headache, loss of appetite, needle eye redness and swelling, pain or inflammation such as scleroma, this is the general response to vaccines, this kind of reaction generally do not need special treatment, 2 ~ 3 days to recover on its own. Due to individual differences, such as allergic constitution, some vaccines may occur in cases such as rash, anaphylactic shock and other allergic reactions. This is an abnormal reaction and needs to be treated in the hospital. Also some babies vaccination is a disease of disease, or there has not yet found the basis of the incubation period after vaccination coincidence, known as coupling, coupling and vaccine itself has nothing to do.
After being forced to stop in the interval, the train group is allowed to return to the rear station.
Spacecraft flew hundreds of thousands to hundreds of millions of kilometers from the earth, injecting speed when the size and direction of a slight error, arrived at target planets will appear large deviation error, for example, when Mars probe injecting speed 1 m/s speed (about one over ten thousand), arrived at Mars, about 100000 km distance deviation. Therefore, precise control and navigation must be carried out during the long flight. Flying to the moon is usually controlled by the orbital control system of the ground and space probe (see orbit control). Interplanetary flight distances, radio signal transmission time is long, the real-time remote control, can't so planets and interplanetary spacecraft orbit control system shall have the ability of autonomous navigation (see interstellar travel navigation and control). The United States, for example, "pirates" spacecraft in space flight of more than eight hundred million km, for 11 months of 2000 times of autonomous orbit adjustment, the final surface to achieve a soft landing on Mars, placement accuracy up to 50 km. In addition, in order to ensure the accuracy of the orbit control engine, the communication antenna is always aimed at the earth, and other systems work normally, and the detector has the autonomous attitude control ability
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