| ★ |  What are the side effects of Covid 19 vaccine? | Tiny Medicine @tinymedicine | 192 | Estados Unidos | |
| 11 |  COVID-19 Vaccine Explained For Kids by Nanogirl | Nanogirl - STEM activities for kids @nanogirlstemactivitiesforkids | — | Nueva Zelanda | 74 |
| 8 |  Les remèdes miracles abandonnés ! 💊 | Science Trash @sciencetrash | 74.9K | Francia | 75 |
| 14 |  Doctors Debate Vaccines - Uncovering the Truth from the Noise | Mark Hyman, MD @drmarkhyman | 17.1K | Estados Unidos | 73 |
| 18 |  The vaccine preventing the deadly cancer, HPV | BBC News | | 14.1K | Reino Unido | 72 |
| 9 |  A quoi ça sert un vaccin ? Pourquoi sont-ils obligatoires ? Comment fabrique-ton un vaccin ? | Info ou Mytho ? @infooumytho | 8.4K | Francia | 75 |
| 20 |  Hantavirus : faut-il s’inquiéter de l’absence de vaccin ? | | 2.2K | Francia | 71 |
| 17 |  Vaccine Skepticism and Public Policy | University of California Television (UCTV) @uctv | 1.1K | Estados Unidos | 72 |
| 19 |  (S009) Are fetal cells used to make COVID-19 vaccines? | North Dakota Public Health Training Network @ndphtn | 506 | — | 72 |
| 7 |  Senate investigates what health officials knew about COVID 19 vaccine side effects | | 319 | Estados Unidos | 77 |
| 5 |  (S013) COVID-19 Vaccines: Are They Safe? | North Dakota Public Health Training Network @ndphtn | 315 | — | 77 |
| 2 |  (S011) COVID-19 Vaccines: Are They Necessary? | North Dakota Public Health Training Network @ndphtn | 269 | — | 78 |
| 1 |  (S012) COVID-19 Vaccines: Do They Work? | North Dakota Public Health Training Network @ndphtn | 209 | — | 78 |
| 12 |  la fabrication du vaccin | Sciense-pro @sciense-pro9529 | 111 | Francia | 74 |
| 10 |  What's In A Vaccine? | The Partnership In Education @thepartnershipineducation | 65 | Estados Unidos | 74 |
| 15 |  Important General Science Questions (MCQs) with Explanations for all Competitive Exam | GK Questions | Competitive Wisdom @competitivewisdom | 39 | India | 72 |
| 13 |  The COVID-19 vaccine on Facebook: A study of emotions expressed by the Brazilian public | RevistaComunicar @revistacomunicar | 9 | España | 73 |