infectiously (adverb)

1. In the infectiously thrilling science fiction novel, an alien virus spreads rapidly through a futuristic society, leading to chaos and uncertainty.

2. During the Black Death pandemic in the 14th century, the deadly plague spread infectiously throughout Europe, decimating the population.

3. In the classic novel, the protagonist's laughter was described as infectiously joyful, spreading happiness to those around them.

4. In the animated series, the villain's evil laughter was infectiously menacing, striking fear into the hearts of the innocent characters.