বাংলাদেশের মানুষদের বাঁচাতে এখনই ভ্যাকসিন নিশ্চিত করতে হবে!

Researchers around the world are developing more than 140 vaccines against the coronavirus. Vaccines typically require years of research and testing before reaching the clinic, but scientists are racing to produce a safe and effective vaccine by next year.

source