During the first one to two months of life, infants are incapable of deep sleep (they do not have trouble falling asleep but they do not generally stay asleep for very long stretches). This happens because infants can’t make the difference between night and day - they do not yet have a circadian rhythm. Around six weeks, the hormone melatonin is produced (pineal gland) and it helps establish a normal sleep-wake cycle.
The internal clock system in a newly born baby is not synchronized with the 24 hour clock system of the real world and thus most of the newly born babies hardly sleep more than 4 hour at a time. The Circadian rhythms of a fetus is synchronized with the mother's heart rate and breathing when he/she is in womb. After birth a child has to develop its own circadian rhythms when exposed to sunlight and night frequently but this process takes time.
A new moon Definition of new moon: the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent.
the virus enters your nervous system and lies dormant for years. eventually it could reactivate and travel along nreve pathways to the skin causing shingles.