How might the progression of HIV have been different in the US if it appeared in 1928 rather than 1978?

Question

Quizplus · Accepted Answer

All of the options given are correct and would likely have slowed the progression of HIV if it had appeared in the US in 1928 rather than 1978. Blood transfusions were rarer in earlier decades, reducing the likelihood of transmission through that mode. Sexual behavior was generally more conservative, with fewer partners over a lifespan, which would have limited the spread of the virus. Finally, travel was less common, meaning that people were less likely to have contact with individuals from other regions or countries where the virus might have been present. Together, these factors suggest that the overall progression of HIV would have been slower if it had emerged earlier.

How Might the Progression of HIV Have Been Different in the US