Answer: the lack of adequate infrastructure.
Explanation:
Answer:
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Asma, faringitis estreptocócica, enfisema y fibrosis quística.
Answer:
Naturally Acquired Passive Immunity
Explanation:
Naturally acquired passive immunity can be described as a type of immunity in which antibodies are transferred from the mother to the infant through placenta or through breast feeding. This type of immunity tends to protect the child until the child can develop his/her own immune system. However, this type of immunity is not life long and usually remains from a period of few weeks to 6 months.
Preliminary, non-experimental, research that gathers information about behavior is called 
research.
