They can even be spread by breathing the air around someone who is sick. Some infectious diseases, such as measles, can be prevented by a vaccination, which is a shot that makes you immune to the pathogen. Proper hygiene, such as washing your hands regularly, can also help prevent infectious diseases.
It's sort of like a Furby that hatches from an egg, adorably poking through its glowing shell when you rub it. The normal price of Hatchimals is $50 to $60, but this season's must-have toy is sold out in virtually all stores and major retailer websites.
Hatcheries that sell in this fashion weigh out 950 grams (two pounds) of tilapia fingerlings per box and ship them for around $500. They estimate that 950 grams equals between 1,200 and 1,700 individual fish, so each one weighs between .56 and .79 grams, fair enough, but there are a couple of hidden problems.