I think some people having learned very little science in school, then buried their heads in the sand and assume nothing ever changes or develops.
Most of us, when children, wrote letters, walked to the post box, posted and hoped it would arrive the next dayNow we dash off an emal, which arrives in seconds. Does that make the email and content more suspicious because it isn't on paper and arrived so quickly.
Scientific and technical advances have had the same effect on scientific research. Computers can anaylse data in seconds that previously took months, analytical equipment can look at data, see viruses in enormous detail. We understand their DNA of host and victim. Products can be produced immensely quickly using different equqipment and using new techniques.
A vaccine against Ebola, in fact several vaccines against Edola were developed very quickly, I think in under a year. It has been done once, why shouldn't it be done again?