sinovac is the first vaccine available in my country, even this type of vaccine is widely used by officials in my country. indeed the effectiveness of the Sinovac vaccine is below that of Arstrazeneca, but this effectiveness cannot be known if mass vaccination is not carried out.
Sinovac is my least preferred vaccine, because almost all the countries that have used this vaccine have witnessed spikes in the infection levels (Chile, Indonesia, Cambodia, Turkey, Morocco.etc). Even one Chinese scientist came out in the open and claimed that they need to increase the efficacy of the Sinovac vaccine. And then the price is also very unaffordable. One dose of Sinovac costs around $40, while Pfizer comes at almost half of that cost. AstraZeneca costs just $3 per dose and Sputnik V is priced at $10. Why someone should pay so much extra for a vaccine, when it's efficacy is very low?