Read the passage and answer the items based on them. You are required to select your answers based on the content of the passage and opinion of the author only:

The results of a trial of an experimental cancer vaccine built on the mRNA (messenger ribonucleic acid) platform, made by Moderna and MSD (Merck&Co.), have shown promising results, media announcements claimed last week. Patients taking an immunotherapy drug Keytruda for advanced melanoma (a kind of skin cancer) were less likely to die or have the cancer recur, if they took the vaccine (mRNA-4157/V940) also, the companies said. It was a small study, involving 157 patients. The vaccine showed a 44% reduction in the risk of dying of cancer or having the cancer progress. Moderna’s Paul Burton was quoted as saying: “This is a significant finding. It’s the first randomised-trial testing of an mRNA therapeutic in cancer patients.” Reuters reported that “the combination was generally safe and demonstrated the benefit compared with Keytruda alone after a year of treatment. Serious drug-related side effects occurred in 14.4% of patients who received the combination compared with 10% with Keytruda alone.” As a personalised cancer vaccine, it is tailor-made for every patient. As a consequence, it is expected to be very expensive to make. The results too will have to be independently scrutinised by experts, western media has reported. But oncologists across the world have welcomed this as an exciting new opportunity in cancer care.