Edward jenner discovered vaccinations. he found that some of the dairymaids who worked with cows had suffered lesions on their hands, and that these dairymaids were immune to the more severe smallpox . which best explains why the dairymaids were immune to smallpox

They were exposed to cowpox, and the substance their body produced to fight cowpox also attacked smallpox.

Explanation:

Cowpox is an infectious and contagious disease, of viral etiology characterized by skin lesions in suckling cows, calves and in man. When the employees shown in the question above were working with cows, it is likely that these cows were infected with cowpox. When the maids injured their hands, the virus that caused cowpox managed to enter their organisms and try to infect their cells, however the immune system of the maids' bodies managed to fight this virus, in addition, the immune system kept the information necessary to fight the cowpox virus, which made the employees immune to smallpox. That's because the substance their body produced to fight cowpox also attacked smallpox.

there is no stairs in bungalow

explanation:

poof

i think the answer is gold im not entirely sure