Answer:
Vaccines have been around since 1796 preventing people from diseases and decreasing death rates. I believe due to the modern vaccines and medicine people have been living longer than life expectancies in the 1700's and 1800’s, which was between 30 and 40 years. Vaccines train the human body to recognize viruses or bacteria and the antigens (molecule capable of inducing an immune response) will start attacking the virus or bacteria before it tries to spread and cause sickness once it is has recognized it. However, vaccines are not always 100% safe because they can come with side effects. For example, the Hepatitis B vaccine had a severe allergic reaction, called anaphylaxis which caused difficulty breathing, dizziness, and skin rashes for a few people.
Answer:
They pump blood/help us breathe oxygen.
Explanation:
The lungs are a very important part of the body, without them we would die.
Answer:
The teen will most likley loose wait but does not mean its heathy bc you need calories
Explanation:
Do you have choices or no?
Apples because it’s a fruit.
Chicken because it’s lean meat.
Salad because it’s fresh greens.
Carrot because it’s a vegetable.
Water because it has 0 calories.
