Can people who have had Covid get infected again with another variant, like Delta? Is there any evidence to support this?

 Yes, people who have had COVID-19 can get infected again with another variant, including Delta. Here's the evidence to support this:

Reinfection is possible:

• The Centers for Disease Control and Prevention (CDC) acknowledges the possibility of reinfection with the virus that causes COVID-19, stating: "Reinfection with the virus that causes COVID-19 occurs when you are infected, recover, and then get infected again. You can be reinfected multiple times."
• Studies have shown that reinfection is indeed possible, even with different variants. A UK study published in The Lancet found that the Omicron variant significantly increased the risk of reinfection compared to previous variants.

Factors influencing reinfection:

• Time since previous infection: Immunity from a previous infection wanes over time, making you more susceptible to reinfection.
• Variant type: Newer variants, like Omicron, have shown greater ability to evade immunity from previous infections compared to older variants like Delta.
• Individual immune response: Some individuals have stronger immune responses that provide longer protection against reinfection, while others may have weaker responses.

Important points to remember:

• While reinfection can occur, it generally leads to milder symptoms compared to the initial infection, especially in vaccinated individuals.
• Even with reduced risk of severe illness, reinfected individuals can still spread the virus to others.
• Staying up-to-date with vaccinations and boosters remains the most effective way to protect yourself against severe illness, hospitalization, and death from COVID-19, regardless of previous infection.

Sources for further information: