Interesting article looks at real-world data comparing the various vaccines and their breakthrough infection rates.

Reference: Which COVID-19 vaccine has the lowest rate of breakthrough infections?

Your calls about:

• A man receives his first dose of Covid vaccine. Eight weeks later antibody titre is undetectable. Repeat testing to follow after second dose.
• Does Covid vaccine affect fertility? Short answer: No
• Is it safe to get vaccinated against Covid when breastfeeding? Yes
• A woman with myeloproliferative disorder notes a recent facial rash and hair loss.