CoⓋid-19
One way to inform others in writing that you have been vaccinated against the coronavirus with the assumption that the odds of infecting them are quasi-zero.
Guesstimate what percentage of CoⓋid-19 math teachers and tutors in China, India, or Russia might still be infectious if 99.99% of them were jabbed with their homegrown vaccines.
CoⓋid-19⁺
When someone who has been vaccinated could still be infected and tested positive for the coronavirus for a few common reasons, such as there is a lag between vaccination and protection; the vaccine doesn’t work retroactively; and the vaccine may be ineffective against new variants of the virus.
What percentage of inoculated people worldwide end up being CoⓋid-19⁺ patients?