Understanding the meaning of infections "on average" in R0.. Dispersion factor of coronaviruses.. 3 various ways in which coronavirus waves will hit.. the status of vaccines under trials.. the need to develop second and third generation vaccine.. how can we certainly say there will be a vaccine..  The Coronavirus Daily is brought to you by Ajay Poonia Links to Episode 15-  https://investors.modernatx.com/news-releases/news-release-details/moderna-announces-positive-interim-phase-1-data-its-mrna-vaccine https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/coronavirus-vaccine-current-status-covid-19-vaccine-latest-news-update-oxford-vaccine-failed-in-animal-trials-here-is-what-happened/photostory/75866319.cms?picid=75866364 https://indianexpress.com/article/coronavirus/covid-19-vaccine-latest-updates-6419189/ https://www.genengnews.com/covid-19-candidates/covid-19-keeping-an-eye-on/sinovac-biotech/ https://www.genengnews.com/category/covid-19-candidates/covid-19-front-runner/ https://wellcomeopenresearch.org/articles/5-67 https://www.sciencemag.org/news/2020/05/why-do-some-covid-19-patients-infect-many-others-whereas-most-don-t-spread-virus-all https://www.statnews.com/2020/05/01/three-potential-futures-for-covid-19/