Question: could the father have been a group B man?It would be best for me if you explain the reasoning

Why has it been difficult to make a vaccine for HIV yet it took a short time to make one for COVID-19? (1 comment)

Has the tuberculosis cure been foud (1 comment)

How long does a research project take? (1 comment)

Does your research help the people and the community (2 comments)

the time you got the price how did you feel (1 comment)