| 31. | Many of the community's natives fell victim to epidemics of new infectious diseases, to which they had no natural immunity.
|
| 32. | Poorer sanitation of the time resulted in a constant exposure to the virus, which enhanced a natural immunity within the population.
|
| 33. | The Lenape population had been ravaged not only by war, but by European diseases for which they had no natural immunity.
|
| 34. | During the following decades, many of the natives died of diseases such as smallpox, against which they had no natural immunity.
|
| 35. | As Ken Mattingly had no natural immunity to the disease, Mattingly was then replaced as Command Module Pilot by Jack Swigert.
|
| 36. | Experts think it shows that very low levels of HIV can act like a vaccine that stimulates effective natural immunity, perhaps indefinitely.
|
| 37. | Once bitten by a mosquito carrying the West Nile virus, a victim usually develops a natural immunity, which should last a lifetime.
|
| 38. | While some plant strains may be vulnerable to one disease, for example, others may have natural immunity that enables them to survive.
|
| 39. | Close contact with Europeans had brought to the villages diseases such as smallpox and tuberculosis, against which they had no natural immunity.
|
| 40. | Temperate water herbivores have no natural immunity to these toxins, allowing " Caulerpa " to grow unchecked if introduced to temperate waters.
|
