Can a person presently having COVID-19 (confirmed or suspected) infection be vaccinated?

Person with confirmed or suspected COVID-19 infection may increase the risk of spreading the same to others at vaccination site. For this reason, infected individuals should defer

vaccination for 14 days after symptoms resolution.

If the coronavirus mutated to 30 different strains then how many vaccines must be produced?

It is believed that mutations may not interfere with the effectiveness of the COVID-19 vaccine. In fact, the slow and mild nature of the mutations of the novel coronavirus is good news for a vaccine.

Researchers say that the virus is still so similar now to the initial sequence that differences are unlikely to matter in terms of the vaccine.

Vaccines, in general, tend to target an early version of the virus. Usually, an older strain of a virus will preserve enough features that it will provide immunity against a whole group of variants.

Is the rush now on to develop a vaccine for coronavirus?

Currently, the rush is on and there are over 120 groups all over the world working on a vaccine for COVID-19.  Before a vaccine is released for use, the safety of the vaccine needs to be ensured. It is also essential to ascertain if the vaccine will elicit enough of an immune response. Like drugs, potential vaccines have to pass through clinical trials.