| 11. | In 1918, a particularly virulent strain of influenza killed over 40 million people worldwide.
|
| 12. | Furthermore, new virulent strains of the virus are constantly emerging.
|
| 13. | They reject gangsta rap, the virulent strain of hip-hop that glorifies violence and misogyny.
|
| 14. | Finally, the research team needed to acquire a virulent strain.
|
| 15. | Animal manure is the primary reservoir for a virulent strain of E . coli.
|
| 16. | Symptoms in animals vary, but virulent strains can cause death within a few days.
|
| 17. | The most virulent strains hit about every 30 years.
|
| 18. | Neo-Nazi groups preach a virulent strain of racist nationalism.
|
| 19. | Such transfers create virulent strains from previously avirulent strains.
|
| 20. | Before 1900, most people avoided settling on Mindoro due to a virulent strain of malaria.
|