Final answer:
The technician should provide factual information and reassurance about the importance of vaccinations for the puppy's health and public health. They can address the client's concerns about adverse reactions by explaining the safety measures vaccines undergo. They can provide examples of vaccines being proven safe and effective.
Step-by-step explanation:
When addressing the client's concerns about vaccinations for her 14-week-old puppy, the technician should provide factual information and reassurance. They can explain that vaccinations are important for protecting the puppy from serious illnesses and preventing the spread of diseases to other animals and humans. The technician can also address the client's fears of adverse reactions by explaining the rigorous testing and safety measures that vaccines undergo before they are approved for use. They can provide examples of how vaccines have been proven to be safe and effective in preventing diseases.