Animal immunisation. Virologists vaccinating calves with a commercially available vaccine against bovine viral diarrhoea (BVD). This is being done to study the immune response it generates in the animals. BVD kills young cattle unless they are vaccinated against it | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Ausmus, Stephen / US Department of Agriculture |
Bildgröße: | 4198 px × 4181 px |
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