Both Karl and Jose are likely to get sick this time since Jose's vaccine was dead, but neither will get it again once they acquire active immunity.
Karl will get sick and Jose will not this time, but neither will get this influenza again since they both will have acquired active immunity to it.
Karl will get sick and Jose will not this time, but Jose will be more likely to get it later since his immunity will be less recent than Karl's.
Both Karl and Jose will get sick this time since Jose's immunity has had time to wear off, but Karl is more likely to get it again since he has only been exposed once.
Answer:
Only an experiment can prove whether the proposed hypothesis is true or not true.
Hypothesis can be described as a tentative statement which can either be supported by the results from the experiments or can be rejected by the results of the experiments. When repeated experiments give the same results again and again, the hypothesis might take the shape of a law.
Keratinized (containing keratin), stratified (2 or more layers) squamous (flattened) type of epithelium
Different animals have different adaptations due to their habitat, which help them survive. For example, the camel located in deserts have 2 humps where fat is stored which can be metabolised for energy.