Answer:
vaccination programs
this is to help reduce the spread of the disease from one person to another at a fast rate
The correct answer is to do 100 to 120 compression per minute.
Areya's sequence of what she did was correct, she checked for consciousness, called 911 and then started to do chest compressions. As she is still learning CPR and is not that confident yet in her abilities it is recommended that the amount of compressions performed is 100 to 120 per minute not 60.
Yellow Marrow is common in the skeleton in old age but not in a childhood skeleton.
Skin immunity is a property of skin that allows it to resist infections from pathogens. In addition to providing a passive physical barrier against infection, the skin also contains elements of the innate and adaptive immune systems which allows it to actively fight infections. I hope that this helps.