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Author Question: Who prepared a report for the Massachusetts Sanitary Commission that pointed out that much of the ... (Read 34 times) |
Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Blood is approximately twice as thick as water because of the cells and other components found in it.