I had completed the 2 Astra-Zeneca shots, and then had a Pfizer booster after 4 months, but apparently I had already been infected the previous day. The symptoms were very mild, a little headachy and just fatigued, lasted for about 10 days. It felt like side effects from the booster, but was the actual disease.
Get the shots. Don't believe idiot fat slugs like Palmer and Christensen, who have their own political agenda to push.