Examine the following sentences and write B if the statement shows bias and NB if not.

1. Regine Velasquez is the best singer.
2. The Pfizer BioNTech COVID-19 vaccine is a messenger RNA (mRNA) vaccine that has both synthetic, or chemically produced, components and enzymatically produced components from naturally occurring substances such as proteins.
3. The vaccine does not contain any live virus.
4. All countries around the world are doing their best to stop the spread of the deadly virus.
5. Pres. Rodrigo Duterte is the best president that the Philippines ever had so far.​