... way that major new strains come into being. Another possibility is that two animals influenza strains may recombine in a pig, for example, to produce a new strains which is transmitted to man. ... are contracted. 4. New strains of viruses are transmitted to man by __________ A. a variety of means. B. diseased lower animals. C. a group of migrating birds. D. a type of wild pig. 5. It ... 1. B 2.D 3.C 4.A 5. B II. Read the test below and decide which answer(A, B, C or D) best fits each space. ( 1 point for 1 correct answer = 10 points) 1. D 2. B 3. A 4. C 5. D 6. B 7.C 8.A...