Answer:
he suffered from SCID/severe combined immunodeficiency.
hope this helps! :)
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.
If you are exercising in your target fitness zone, you are between your threshold of training and your target ceiling.
If you achieve a good fitness rating, you probably are at the level of fitness needed to live a full, healthy life.
These are what I found on Quizlet.
A. Working out in the morning is more effective...
