There are now 28 cases of the coronavirus in Singapore.

However due to the nature of contact tracing, these cases, even though they might be confirmed at different times, have high degrees of relations to one another.

Here is a comprehensive grouping as to the relations between these different cases.

Cases 1 and 3

Relationship: Father and son

Age: 66 and 37 respectively

Nationality: Both are Chinese citizens from Wuhan

Related articles:

Cases 2, 13 and 26

Relationship: Case 2 is a close contact of case 13. Case 26 is case 13’s daughter

Age: 53, 73 and 42 respectively.

Nationality: All three are Chinese nationals

Related articles:

Cases 4 and 11

Relationship: Travelling companions

Age: 36 and 31 respectively

Nationality: Both are Chinese nationals from Wuhan

Related articles:

Cases 8 and 9

Relationship: Husband and wife

Age: 56 and 56 respectively

Nationality: Both are Chinese nationals from Wuhan

Related articles:

Cases 12 and 18

Relationship: Travelling companions

Age: 37 and 31 respectively.

Nationality: Both are Chinese nationals who arrived from Wuhan.

Cases 15, 17, 22 and 23

Relationship: Evacuees from Wuhan. It is unknown if they are close contacts of each other.

Age: 47, 47, 41 and 17 respectively

Nationality: All Singapore Citizens

Related articles:

Lavender cluster cases

The Lavender cluster, which represents the majority of cases for the past two days, came about when a tourist group from Guangxi, China visited a medicine shop there.

The cases infected from that specific visit were the two workers in the shop at that time, as well as the tour guide leading the tour group.

Cases 19 and 20

Relationship: Colleagues who worked at Yong Thai Hang

Age: 28 and 48 respectively

Nationality: Both are Singapore Residents

Related articles:

Case 19 was the first reported case to engage in local human-to-human transmission.

Cases 19, 21, 27 and 28

Relationship: Case 19 and 27 are husband and wife. Case 28 is their six-month-old son. Case 21 is a foreign domestic worker who works for the family.

Age: 28, 44, 45 and 6-months-old respectively

Nationality: Case 19 is a Singapore Resident, Cases 27 and 28 are Singapore Citizens, and Case 21 is an Indonesian National.

Related articles:

Case 24 and 25

Relationship: Married. Case 24 is a tour guide who brought groups to visit the Chinese medicine shop in Lavender. Case 25 is her husband.

Age: 34 and 40 respectively

Nationality: Case 24 is a Singapore Resident. Case 25 is a Singapore Citizen.

Related article:

Cases with no confirmed relations to each other as of this article

Cases 5, 6, 7, 10, 14, and 16

Case 7 has also recovered, the very first person in Singapore to recover from the virus.

Age: 56, 56, 35, 56, 31, and 38 respectively

Nationality: All are from mainland China.

Here's a handy guide.

Image from Andrew Koay and Guan Zhen