1.An infant's automatic and coordinated pattern of movements is called Reflexes. There are reflexes already present when the infant is born such as the Sucking reflex while others would be present later on. 2. The form of speech in which the meaning is clear but words are left out is called the Telegraphic Speech.
3. The common reaction of infants especially when the mother is absent is Separation Anxiety. This kind of feeling can still be there even on the later life.
This is how vaccines are used. You introduce the antibodies in a vaccine so the person builds up an immunity and never develops the disease
